Senate Majority Leader Harry Reid (D-Nev.) said Wednesday that the conservative Koch brothers are "un-American."

Responding to ads being run by a Koch-backed group against Obamacare, Reid said the ads go too far and that Charles and David Koch are trying to "buy" America.

"It's too bad that they're trying to buy America, and it's time that the American people spoke out against this terrible dishonesty of these two brothers who are about as un-American as anyone I can imagine," Reid said on the Senate floor.

Earlier in the day, Reid had suggested that all of the horror stories being told about Obamacare -- including in ads sponsored by the Koch group Americans for Prosperty -- were "untrue."

He later clarified that it was only the "vast, vast majority" of those ads that were inaccurate.

The Koch organization noted that one of its ads features a woman suffering from leukemia who shares her story, and it accused Reid of attacking someone with cancer.

The Koch brothers have emerged as popular bogeymen for Democrats in recent months.

(Video above clipped by the Washington Free Beacon)