Then-Sen. John F. Kennedy participates in a question-and-answer session with the Ministers' Association of Greater Houston on Sept. 12, 1960, in Houston. In a speech to the group, Kennedy addressed concerns about his Catholicism and his run for the presidency. Houston Chronicle/AP hide caption

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On the campaign trail, Rick Santorum portrays himself as a Washington outsider. But the former senator has made money from inside-the-Beltway pursuits. Jeff Kowalsky/EPA/Landov hide caption

itoggle caption Jeff Kowalsky/EPA/Landov

Republican presidential candidate Rick Santorum, center, and supporters as they prayed earlier this month in McKinney, Texas. Tom Pennington/Getty Images hide caption

itoggle caption Tom Pennington/Getty Images

Rick Santorum and Mitt Romney took the stage in a January presidential debate in Florida. They'll meet again Wednesday night in Arizona, which holds its primary on Feb. 28, the same day as the crucial Michigan contest. Paul Sancya/AP hide caption

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