Carrie Underwood at CMAs -- Suck It, Mr. President!!!

Carrie Underwood may not be your classic country s**t-kicker, but she's definitely a s**t-stirrer ... because she got the CMA crowd all riled up Wednesday night by taking a shot at the Prez.

Carrie and Brad Paisley got all political with a reference to Taylor Swift, whom they suggested has abandoned country music.

There's a tiny bit of room for interpretation ... whether the audience is going wild over the fact that the Democrats lost the Senate, or whether Obama is so unpopular he derailed his own party.

It's the second time in 2 years Obama's been skewered at the Country Music Awards.

Oh, and Brad took a shot at TMZ, too. We'll take that as a challenge.