BOSTON (CBS) – Sen. Scott Brown poked fun at Republican presidential candidate Rick Santorum at the annual St. Patrick’s Day breakfast Sunday in South Boston.

Listen: Scott Brown at the St. Patrick’s Day Breakfast

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“I see that both Newt Gingrich and Rick Santorum now have Secret Service with them on the campaign trail,” Brown said. “And in Santorum’s case, I think it’s the first time he’s actually ever used protection.”

Brown, of course, was referring to Santorum’s stance on birth control.

He didn’t stop there, taking shots at each of the other Republican presidential candidates.

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“You all know that Newt Gingrich wants to build a colony on the moon. Forget the moon – I think he should build it whatever planet Ron Paul’s from,” said Brown.

In another instance, Brown quipped that he almost didn’t make it to the event because his famous truck has 230,000 miles on it. He used that as an opportunity to take a shot at former Massachusetts Governor Mitt Romney, the current frontrunner in the Republican presidential race.

“Governor Romney was nice enough to give me one of his Cadillacs, so we’re all set,” Brown said.

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The breakfast is an opportunity for Massachusetts politicians to lightly mock one another and for once, put the politics aside.