Franks said there was not enough evidence that Obama is not an American citizen. He did say there was a lot of conflicting evidence of Obama's citizenship and that he was considering filing a lawsuit, the only congressman to do so. Franks asked why the president did not simply produce a birth certificate.
The Washington Independent's Dave Weigel points out that Franks' bold move is particularly surprising given that Franks has previously made a clear statement to guerilla video-blogger Mike Stark that the president was born in the United States and had a valid birth certificate.
HUFFPO has your source
Loving the double negative in that second paragraph... *facepalm*