Republican presidential candidate, Herman Cain campaigned Wednesday in Dayton, Ohio. He told a Fox News interviewer he would decide in the next week whether to stay in the GOP race. Al Behrman/AP hide caption

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In this image taken from video and provided by Worldwide Pants, Inc., Republican presidential candidate Rick Perry presents the "Top Ten Rick Perry Excuses," on the set of the Late Show with David Letterman. AP hide caption

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Cain accuser and longtime government employee Karen Kraushaar once worked as a spokesperson for the Immigration and Naturalization Service. She offered a statement after meeting with the Miami family of Elian Gonzalez in March of 2000. Miami Herald/Getty Images hide caption

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Sharon Bialek, left, aired her accusations against Herman Cain during a news conference Monday in New York City. The event was organized by lawyer Gloria Allred, right. Timothy A. Clary /AFP/Getty Images hide caption

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Tuesday: Republican presidential candidate Herman Cain is surrounded by police, body guards, staff members and journalists on Capitol Hill. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images