A Republican congressman from Wisconsin has offered a personal apology to First Lady Michelle Obama after he was overheard at an airport lounge criticizing her "large posterior."

Rep. Jim Sensenbrenner was overheard loudly complaining on the phone in the Delta Lounge at Reagan National Airport outside Washington about Obama's healthy food initiative.

According to Fishbowl DC, which first reported the lawmaker's remarks, Sensenbrenner was recounting a recent conversation he'd had at church event in Wisconsin.

Obama, Sensenbrenner said loudly, "lectures us on eating right while she has a large posterior herself."

According to the Milwaukee Journal-Sentinel's Daniel Bice, Sensenbrenner made a similar remark at the Wisconsin church he was referencing in his phone call, telling attendees there that Obama has a "big butt."

The Wisconsin lawmaker—who, it must noted, is a bit rotund--sent a personal note to Obama apologizing for his remarks, his spokeswoman Amanda Infield tells Yahoo News. She declined to go into detail about what the note said.

In a statement to reporters, the lawmaker reiterated his apology. "I regret my inappropriate comment, and I have sent a personal note to the First Lady apologizing," he said.

A spokesman for Obama did not respond to a request for comment.

It's not the first time Republicans have mentioned Obama's looks in criticizing her campaign to end childhood obesity. Earlier this year, Rush Limbaugh trashed the initiative, suggesting Obama doesn't physically appear to practice what she preaches.

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