The usually affable Herman Cain appears to be feeling the heat. Full coverage of Herman Cain's campaign.
Carolyn Kaster / AP
Republican presidential candidate Herman Cain wipes his brow as he speaks at the Congressional Health Caucus Thought Leaders Series, Wednesday, Nov. 2, on Capitol Hill in Washington.
Republican presidential hopeful Herman Cain gets testy with reporters after a conference in Alexandria, Va. Msnbc's Craig Melvin reports.