ABC is falsely reporting that Ron Paul will leave the race tonight. The campaign just released this video update, and there is no indication that he is leaving:
Ron Paul's Message to Supporters
In it, Dr. Paul admits his chances to win the presidency are pretty much zero, but he will campaign wherever his supporters want him and continue to financially support him so that he can continue to spread the message of human liberty.
His book that he mentioned, The Revolution: A Manifesto, can be pre-ordered here.
Also, the rally in Washington he proposed a few weeks ago will not be handled by the campaign, but he did recommend that the march be held on June 21.