MLK III sent this to John Edwards following their meeting.

http://www.johnedwards.com/news/20080121-mlk-iii-letter.pdf

here are some excerpts,

I appreciate that on the major issues of health care, the environment, and the
economy, you have framed the issues for what they are - a struggle for justice.

And, you have almost single-handedly made poverty an issue in this election.
You know as well as anyone that the 37 million people living in poverty have
no voice in our system. They don’t have lobbyists in Washington and they
don’t get to go to lunch with members of Congress. Speaking up for them is
not politically convenient. But, it is the right thing to do.

I am disturbed by how little attention the topic of economic justice has
received during this campaign. I want to challenge all candidates to follow
your lead, and speak up loudly and forcefully on the issue of economic justice
in America.

From our conversation yesterday, I know this is personal for you. I know you
know what it means to come from nothing. I know you know what it means to
get the opportunities you need to build a better life. And, I know you know that
injustice is alive and well in America, because millions of people will never get
the same opportunities you had.

I believe that now, more than ever, we need a leader who wakes up every morning with the
knowledge of that injustice in the forefront of their minds, and who knows that when we
commit ourselves to a cause as a nation, we can make major strides in our own lifetimes. My
father was not driven by an illusory vision of a perfect society. He was driven by the certain
knowledge that when people of good faith and strong principles commit to making things
better, we can change hearts, we can change minds, and we can change lives.

So, I urge you: keep going. Ignore the pundits, who think this is a horserace, not a fight for
justice. My dad was a fighter. As a friend and a believer in my father’s words that injustice
anywhere is a threat to justice everywhere, I say to you: keep going. Keep fighting. My
father would be proud.

Thank you, Martin Luther King III.
Yes, your father would be proud.