The rumor mill went into overdrive when Stephen Colbert unexpectedly halted production on his nightly Comedy Central program, leaving many to speculate what could have caused the host to abandon his post. PHOTOS: 10

"I would say that he's come from behind, but Santorum is morally opposed to coming from behind," Colbert joked of Santorum. By Sam Schulz Stephen Colbert returned to the air Monday night to mock Rick Santorum and Mitt Romney. After a brief hiatus,

Production of Stephen Colbert's "Colbert Report" will resume on Monday, Comedy Central says. Taping was halted without explanation last week.

Production of Stephen Colbert's "Colbert Report" will resume on Monday, Comedy Central says. Taping was halted without explanation last week.