<<When Strom ran before he switched parties, he garnered nearly 100% of the vote. After he switched parties, he only garnered about 60% of the vote.
<<So, switching parties COST him votes.>>
OF COURSE, it cost him votes, but what choice did the bastard have? He'd already been dishonoured in his own Party, which was no longer going to let him get away with the shit he'd been getting away with all his life. He'd have lost some votes anyway even if he stayed - - the votes of the white racists who were going to be swept up in the success of the GOP Southern Strategy. ANY racist was going to lose votes after the Civil Rights and Voting Rights Acts, because racism was a declining force. Even among white racists, there would have to be a sizeable contingent that would "hold their nose" and continue to vote Democratic for various reasons, finding better value in the Democratic Party despite its "nigger-lovin, race-mixin" tendencies forced down its throat by the rest of the country.
Strom Thurmond obviously did not leave the Democratic Party in the face of a strong Party campaign to keep him on board. There must have been plenty of urban liberals and newly-enfranchised blacks in the Party who were delighted to see the back of him. A huge power shift had just occurred in the Party, with obvious winners and losers. Strom, fortunately, was not only one of the losers, but one of the ugliest and most prominent among them. Is anyone here really surprised that he'd quit the Party? Or, once he'd left, that it would be the GOP where he'd find his new home? Unfortunately for that racist piece of shit, there wasn't any viable American Nazi Party waiting to receive him or his ilk with open arms. He picked the only refuge available to him, and he happened to fit in with its Southern Strategy to capture the white racist vote of the South, so there was a match of kinds.