(POLITICO) — Newt Gingrich has made questions about President Barack Obama and the president’s “attacks” on the Roman Catholic Church a central theme of his campaign. So has Rick Santorum.

Both turned up the burner on the rhetoric last week — Gingrich by asking why Obama does things that make voters question his religion, and Santorum by unveiling an ad — that spliced images of the president with Iranian strongman and Holocaust denier Mahmoud Ahmadinejad. Santorum’s team says the visual juxtaposition was unintentional.

Note: Read our discussion guidelines before commenting.