Anderson Cooper demolished the claims behind the "birther" movement in an interview with Texas State Representative Leo Berman on his Monday show.

Berman is sponsoring a bill to require that all presidential candidates produce a valid birth certificate to get on the presidential ballot in Texas -- a clear reference to the claim that Barack Obama is not a natural-born citizen of the United States, and has falsified his birth records.

The two sparred for over 12 minutes, and Cooper methodically refuted each claim Berman made, from the validity of the birth certificate that the Hawaiian government released to the dates in which Obama traveled to Pakistan.

"I mean, you're basing legislation on stuff that's basically just rumors and -- and stuff that's been proven to be false," Cooper told Berman,

WATCH: