The New York Times reports:

CHARLESTON, S.C. – Senator John Kerry is set to endorse the presidential candidacy of Senator Barack Obama at a rally here today, the first of several high-profile Democrats expected to announce their support for Mr. Obama in his fight to win the party’s nomination.

Mr. Kerry, a Massachusetts Democrat who was the party’s presidential nominee in 2004, will argue that Mr. Obama represents the best prospect for uniting a divided country, aides to both men said, as well as transforming America’s image around the world...

The endorsement ceremony today, on the campus of the College of Charleston, brings the relationship of the men full circle.

It was back in 2004 when Mr. Kerry selected Mr. Obama – then a state senator, vying for a U.S. Senate seat – to deliver the keynote address at the Democratic National Convention in Boston. The speech elevated the stature of Mr. Obama almost overnight, launched the reprinting of his book, “Dreams From My Father,” and set his political career in overdrive.

We'll update this post soon with photos and coverage from the event in Charleston. 

UPDATE: Here's the email John Kerry sent out today...

Hi Sam,

Martin Luther King said, "The time is always right to do what is right." So I'm choosing this time to share an important decision I've made, one I believe is right for this country.

 

The JohnKerry.com community has been very important to me and very important to the Democratic resurgence over the last couple of years, so I wanted to let all of you know my decision before I confirm it with anyone else. I want to share with you my conviction that in a field of fine Democratic candidates, the next President of the United States can be, should be, and will be Barack Obama. Each of our candidates would make a fine President, and we are blessed with a strong field. But for this moment, at this time in our nation's history, Barack Obama is the right choice.

 

Please join me in supporting Barack Obama's candidacy.

 

I'm proud to have helped introduce Barack to our nation when I asked him to speak to our national convention, and there Barack's words and vision burst out. On that day he reminded Americans that our "true genius is faith in simple dreams, an insistence on small miracles." And with his leadership we can build simple dreams, and we can turn millions of small miracles into real change for our country.

 

At this particular moment, with our country faced with great challenges in our economy, in our environment, and in our foreign policy, and with our politics torn by division, Barack Obama can bring transformation to our country. With Barack, we can build a new majority of Americans from all regions who can turn the page on the politics of Karl Rove and begin a new politics, one worthy of our nation's history and promise. We can bring millions of disaffected people – young and old – to the great task of governing and making a difference, child to child, community to community.

 

Please click here to give what you can to Barack Obama's campaign for President and help build this future for our country.

 

The moment is now, and the candidate for this moment is Barack Obama. Like him, I also lived abroad as a young man, and I share with him a healthy respect for the advantage of knowing other cultures and countries, not from a book or a briefing, but by personal experience, by gut, by instinct. He knows the issues from the deep study of a legislator, and he knows them from a life lived outside of Washington. His is the wisdom of real-world experience combined with the intellect of a man who has thought deeply about the challenges we face.

 

History has given us this moment. But we need to decide what to do with it. I believe, with this moment, we should make Barack Obama President of the United States.

 

Please join me in supporting his campaign.

 

Thank you,
John Kerry