The following is a transcribed excerpt of "FOX News Sunday," Jan. 15, 2006. "FOX NEWS SUNDAY" HOST CHRIS WALLACE: President Bush's agenda and the fate of House Republicans in the fall elections could be determined by a fight on Capitol Hill. It's the battle to replace Tom DeLay in the very powerful post of House majority leader. There are three candidates and they're our exclusive guests today, acting majority leader Roy Blunt, Congressman John Boehner, and Congressman John Shadegg. Congressman Blunt did what most frontrunners do. He insisted on being interviewed separately. Congressman, we'll start with you. Good morning. U.S....