FARGO, N.D. — Like sweater vests, talk of his children, and condemnations of "ObamaCare," "glitter-bombing" has become an almost automatic feature of Rick Santorum's candidacy. Protesters targeted the candidate with glitter as soon as he took the stage at a packed rally tonight at the Holiday Inn in Fargo. Unruffled, he launched into his speech.

This is the third time in the last month that Santorum has been glitter-bombed -- Occupy protesters threw glitter at him at the Citadel in Charleston, South Carolina on primary night there, and another group of occupiers glitter-bombed him in Tacoma, Washington on Monday night.

It wasn't immediately clear who did the bombing tonight, though Occupy Fargo mentioned plans to do so on their Facebook page yesterday: