"Pie in the sky, when you die."

Just because you believe nonsense, doesn't make it true.
Ronald Regan became a Republican in 1950, persuaded by Nancy, supported Nixon for Senate that year against his old friend, Helen Gahagan Douglas. He gave the speech that gave Goldwater the presidential nomination in 1964. He was elected governor in 1966. 

Your notions about the Blue Dogs is equally ignorant. I knew some for many years, especially Dennis Moore. Eight became Republicans: Jimmy Hayes (LA-7), Michael Parker (MS-4),  Billy Tauzin (LA-3) and Nathan Deal (GA-9)  all in '95 . Virgil Goode (VA-5) became a Republican in '02. Rodney Alexander (LA-5) and Ralph Hall (TX-4) in '04.  Parker Griffith (AL-5)  in '09.

Many lost to Kochbucks in 2010.

Hall was made a deal by Tom DeLay to keep his seat through redistricting. DeLay was convicted of laundering $20,000 from your friends in Cornell Corrections (partners of Bill Allen and Bill Weimar).  Jim Cooper served on the Cornell board after 1995.