In the ensuing months, testimony from the Gomery Commission caused public opinion to turn sharply against the Liberals for the first time in over a decade. Despite the devastating revelations, only two Liberal MPs—David Kilgour (who had crossed the floor from the PC Party in 1990) and Pat O'Brien—left the party for reasons other than the scandal. Belinda Stronach, who crossed the floor from the Conservatives to the Liberals, gave Martin the number of votes needed, although barely, to hold onto power when an NDP-sponsored amendment to his budget was passed only by the Speaker's tiebreaking vote on May 19, 2005.