The peace movement was later associated with the Peace camp movement as Labour moved "more to the centre" under Prime Minister Tony Blair. By early 2003, the peace and anti-war movement, mostly grouped together under the banner of the Stop the War Coalition, was powerful enough to cause several of Blair's cabinet to resign, and hundreds of Labour Party MPs to vote against their government. Blair's motion to support militarily the U.S. plan to invade Iraq continued only due to support from the UK Conservative Party.