Following the April 2005 release of Jean Brault's damaging testimony at the Gomery Commission, implicating the Liberals in the scandal, opinion polls placed the Conservatives ahead of Liberals. The Conservatives had earlier abstained from the vote on the 2005 budget to avoid forcing an election. With the collapse in Liberal support and a controversial NDP amendment to the budget, the party exerted significant pressure on Harper to bring down the government. In May, Harper announced that Martin's Liberals had lost the "moral authority to govern". Shortly thereafter, the Conservatives and Bloc Québécois united to defeat the government on a vote that some considered to be either a confidence motion or else a motion requiring an immediate test of the confidence of the House. The Martin government did not accept this interpretation and argued that vote had been on a procedural motion, although they also indicated that they would bring forward their revised budget for a confidence vote the following week. Ultimately, the effort to bring down the Martin government failed following the decision of Conservative MP Belinda Stronach to cross the floor to the Liberal Party. The vote on the NDP amendment to the budget tied, and with the speaker of the House voting to continue the debate, the Liberals stayed in power. At the time, some considered the matter to be a constitutional crisis.