Conservatives rationalized on May 13 when Republicans lost their third consecutive special Congressional election, in the supposedly safe 1st District of Mississippi. After all, they said, the victorious Democratic candidate Travis Childers, sounded more conservative during the campaign than his losing Republican candidate. He was a county official, a good old boy who the voters figured would be an independent conservative vote in the House as one of the Blue Dog Democrats. But once in Washington, he drank the Democratic leadership’s Kool Aid. In the first 13 House roll calls contested along partisan lines after Childers took his seat in...