Fresh from his blow-out with Texas Sen. John Cornyn, Sen. John McCain went all Looney Tunes on Mitt Romney over the former Massachusetts governor's criticism of the Senate's immigration-reform package.

From the AP report:

Republican John McCain accused presidential rival Mitt Romney of flip-flopping on immigration Monday and said with sarcasm: "Maybe his solution will be to get out his small varmint gun and drive those Guatemalans off his lawn."

It's a pretty funny line for those who have followed Mitt's campaign. As AP reporter Liz Sidoti explains later in the piece:

Romney has faced criticism for calling himself a lifelong hunter even though he joined the National Rifle Association in August and officials in four states where he has lived said he never took out a hunting license. Defending himself, he said in April, "I've always been a rodent and rabbit hunter, small varmints, if you will."

Also, The Boston Globe reported late last year that several illegal immigrants, including at least one from Guatemala, worked at the lawn care company that worked on Romney's two-and-a-half acre property in a Boston suburb for a decade. His aides have said that Romney was not aware of the workers' status, and that the owner was in the country legally.

A rodent and rabbit hunter? OK, Elmer Fudd: Best of luck getting that scwewy wabbit this season!