Early Endorsements
Speaking at an EMILY's List event in New York in Oct. 2013, Sen. Kay Hagan let slip the existence of a secret letter circulated by Sen. Barbara Boxer in the first part of the year in which all 16 Democratic women senators urged Clinton to run.  On Jan. 28, 2014 The Hill newspaper reported it had done a survey of Democratic lawmakers in the House and Senate and found that 56 of them would endorse Hillary Clinton if she runs for president in 2016.  The Hill survey identified 22 congressional Democrats who had already publicly endorsed Clinton and another 34 who would do so if she runs.  The number was later updated to 60.  See:  Jasmine Sachar and Bob Cusack "60 Dems endorse Hillary for 2016."  The Hill. 

Ready for Hillary reports that their efforts have received "assistance or public praise" from a growing list of elected officials including 

U.S. Sens. Richard Blumenthal (CT), Barbara Boxer (CA), Richard Durbin (IL), Al Franken (MN), Martin Heinrich (NM), Tim Kaine (VA), Amy Klobuchar (MN), Claire McCaskill (MO), and Debbie Stabenow (MI) .

U.S. Reps. Jim Cooper (TN), Tammy Duckworth (IL),  Eliot Engel (NY), Pete Gallego (TX), Janice Hahn (CA),  Nita Lowey (NY), Carolyn Maloney (NY), Grace Napolitano (CA), Cedric Richmond (LA), Tim Ryan (OH), Jan Schakowsky (IL), Adam Smith (WA),  Dina Titus (NV) and Filemon Vela (TX).

For example U.S. Rep. Tim Ryan (OH), who represents the Youngstown area, has participated in several Ready for Hillary events, Sens Claire McCaskill (MO), Tim Kaine (VA) and Debbie Stabenow (MI) have done fundraising emails for the group.  The Los Angeles Times reported that Sen. Barbara Boxer (CA) was set to head a "Ready for Hillary" fundraiser on June 19 in Washington, DC.  Sen. Mark Warner (VA) is scheduled to be the special guest at a "Ready for Hillary" fundraiser in Richmond on Aug. 5, 2014.  In a May 25, 2014 article Newsday's Tom Brune reported  that Sen. Kirsten Gillibrand (NY) "made an unannounced stop at a local bar for a 'Ready for Hillary' rally" in April in Seattle.  
Sen. Claire McCaskill (D-MO)
Ready for Hillary press release
June 18, 2013

U.S. Senator Claire McCaskill (D-MO), an Early Obama ‘08 Supporter, Announces Support of Ready for Hillary

MCLEAN, VA – Today, U.S. Senator Claire McCaskill of Missouri, an early backer of then-Sen. Obama’s 2008 primary campaign, announced her support of Ready for Hillary. Sen. McCaskill is the first sitting member of Congress to endorse the effort.

McCaskill, who said in February that she hopes Hillary Clinton will run for president, described the Ready for Hillary effort as “critical” to electing the former Secretary of State, should she decide to run in 2016.

“Hillary Clinton had to give up her political operation while she was making us proud, representing us around the world as an incredible Secretary of State, and that’s why Ready for Hillary is so critical,” McCaskill said. “It’s important that we start early, building a grassroots army from the ground up, and effectively using the tools of the Internet – all things that President Obama did so successfully – so that if Hillary does decide to run, we’ll be ready to help her win.”

Sen. McCaskill commended Ready for Hillary for embracing the early supporters of then-Sen. Obama, saying, “They aren’t only reaching out to folks who supported Hillary in 2008. They’re helping to show that regardless of who you supported for President back then, we can all agree today that there is nobody better equipped to be our next President than Hillary Clinton.”

“We are incredibly grateful to have Senator McCaskill’s support in this effort,” said Ready for Hillary Senior Advisor Craig T. Smith. “Like Hillary, Senator McCaskill is a fighter – dedicated in her efforts to strengthen accountability in government – and a champion for women, children, and families. Ready for Hillary is fortunate to have such a powerful and respected leader like Claire joining our grassroots team.”

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Ready for Hillary is the nation’s premier independent group urging former Secretary of State Hillary Clinton to run for president in 2016. RFH is working to lay the groundwork by assembling an army of grassroots Hillary supporters and building an organization to support her potential candidacy. We believe that Hillary Clinton is the best qualified person to be President in 2016 and her historic election would build upon the progress of President Obama and continue to lead this country into the future.

Sen. Tim Kaine (D-VA)
Ready for Hillary press release
FOR IMMEDIATE RELEASE
May 3, 2014
Contact: Seth Bringman

Sen. Tim Kaine Encourages Hillary Clinton to Run for President in 2016

Speaking in South Carolina, Kaine Joins Ready for Hillary Effort

COLUMBIA, SC – Speaking at the South Carolina Women’s Democratic Council breakfast today, U.S. Senator Tim Kaine (D-VA) joined the Ready for Hillary effort, encouraging Hillary to run for president and pledging his support for her candidacy should she decide to do so. Kaine is in Columbia as the keynote speaker for the annual South Carolina Jefferson Jackson Dinner.

Excerpts from Kaine’s remarks, as prepared for delivery, follow:

Secretary Hillary Clinton is the best person to be our 45th President for many reasons. She is a classic American optimist with the background and experiences necessary to lead this country in a very complicated world.

She has a deep history of engagement in domestic policy issues—the economy and jobs, education, the equal status of all, children and family programs—that started long before she came to Washington. ...She understands the challenges facing Americans from all walks of life and has the compassion and skill necessary to help improve our everyday lives.

She has a powerful background in international and foreign policy. Her work as First Lady, Senator and Secretary of State has given her unmatched knowledge of the world, of our allies and opponents, and of global leaders—public and private—who can be partners for progress in the years ahead.

...

Our country will have no shortage of challenges to tackle in the future. … And the very list of challenges on the table tells us who the next President should be. That’s why I stand with you today to encourage Hillary Clinton to run, to pledge my support for her candidacy if she does and to ask you to make that same pledge.

...

In 2006, nearly 2 years before the 2008 Presidential election, I told my friend, then-Senator Barack Obama, that I would support him if he ran for President of the United States. I was and am proud that I was an early supporter of our great President. I made my decision early because I knew something—he was the right person for the job but getting there would be hard. And I figured that the sooner I started helping him in Virginia, the more helpful I would be.

I’m stating my support for Hillary Clinton today for the same reason. She’s the right person for the job. I’ll be starting my fifth year in the Senate on Inauguration Day 2017 and she’s the partner I know I’ll want to be working with in the White House on all fronts.

But getting there will still be hard.

If it were easy for women to achieve top leadership spots in this country, Congress would have more than 18 percent women serving. More than five percent of Fortune 500 companies would have a woman CEO. And women would be seated on more than a quarter of the federal benches across the country.

...

So I’m doing my bit now to encourage Hillary Clinton to run. I’m encouraging my constituents in Virginia and also encourage all of you to do the same thing by joining the Ready for Hillary movement that already has two million supporters. Pledge your support right now so that Hillary Clinton will know that, should she take this step, there are millions of us ready to take the field with her and make sure she wins.

...


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With more than two million supporters, Ready for Hillary is encouraging former Secretary of State Clinton to run for president in 2016. Ready for Hillary is assembling an army of grassroots supporters and sending a message that if she is ready to run for president, we are ready to support her. We believe Hillary Clinton is the best qualified person to be president in 2016 and that her historic election would build upon the progress of President Obama and continue to lead this country into the future.

Sen. Debbie Stabenow (D-MI)
Ready for Hillary fundraising email [endorsement same day in CNN op-ed]
May 22, 2014

Name --

I want to tell you why I'm excited about 2016:

One person stands out in her experience, competence and dedication to the men, women, and children of this country.

That person is Hillary Clinton. I've known Hillary for more than 30 years, and we came into the U.S. Senate the same year. We worked together to help people across this country who are working hard and just want a fair shot to get ahead in life.

And of course, if Hillary decides to run for president, we could finally break the glass ceiling and elect the first woman president.

In order to do that, though, we need to show her how much support she has and encourage her to run.

Chip in $5 and show Hillary right now that she can count on us all the way.

You have already helped build a movement of more than two million Hillary supporters, and I'm so proud to join you.

Help us build early support for Hillary by chipping in $5 today:

https://www.readyforhillary.com/Hillary_Next

Hillary is absolutely the best person to continue leading us forward. Now let's show that we are ready, 100 percent!

Thanks for your support,

Debbie Stabenow
U.S. Senator, Michigan
Sen. Martin Heinrich (D-NM)
Martin Heinrich for Senate
July 12, 2014 email
Subject: "I'm ready for Hillary"

Dear Friend,

I wanted you to be the first to know that I am joining millions of Americans in pledging my support to former first lady, senator and secretary of state, Hillary Clinton, should she choose to run for president in 2016.

The next presidential election may seem far off, and it is. But this will be a tough campaign with a lot at stake. As she makes her decision, I want Secretary Clinton to know that people across the country share her values and believe that she will be the best person to lead us at this critical time.  

Secretary Clinton started her decades-long public service career fighting for children. She was an early champion of making health care more accessible and affordable. She has worked to raise the minimum wage, and to make it easier for middle class families to get a fair shot.

As secretary of state, she logged nearly a million miles representing our country abroad, restoring American diplomacy and brokering crucial negotiations in some of the world’s most troubled places.

Time and again, she has proven she has the experience and skills to lead.

I know she would be an outstanding president, and I am proud to say I am ready for Hillary. I hope you’ll join me.

Sincerely,

Martin