The predictions proved right. Senate Banking Committee Chairman Chris Dodd’s decision to try to negotiate a bipartisan regulatory reform deal with Republican Sen. Bob Corker was a mistake. The Connecticut Democrat found he had to negotiate away so much to gain just one GOP vote that he would jeopardize support from his own party. Dodd vowed Thursday to release his own version of reform on Monday and hold a committee vote before Easter, but his turnabout left the fate of the reform effort in doubt. “The prospects for the bill took a hit today,” said Brian Gardner, an analyst at KBW. “This was the risk that Dodd took with negotiating with Corker, that in some ways really complicated things. He’s risked losing his own members.”