Bill O’Reilly and Jon Stewart covered a lot of ground last night on “The O’Reilly Factor”: Pres. Obama, the Mosque controversy, the Stewart-Colbert D.C. rally and Christine O’Donnell.

Stewart: “The witch thing: ridiculous. The masturbation comments: ridiculous. She’s one of the least interesting tea party candidates yet.”

Here’s part I:

Part II after the jump:

The Daily News’ Richard Huff was in the studio for yesterday’s taping:

When the camera’s off, “The Daily Show’s” Jon Stewart and Fox News’ Bill O’Reilly talk about kids and summer vacations.

But the moment the red light goes on, everything changes, and Stewart and O’Reilly deliver entertainment that careens between serious and silly.

“We’re killing it, baby, we’re killing it,” Stewart says, during a break in Wednesday’s taping of the Fox News Channel powerhouse “The O’Reilly Factor.”

O’Reilly returns the favor by going on “The Daily Show” Monday.