Former Republican Rep. Bob Barr launched a Libertarian Party presidential bid Monday, saying voters are hungry for an alternative to the status quo who would dramatically cut the federal government. His candidacy throws a wild card into the White House race that many believe could peel away votes from Republican Sen. John McCain given the candidates' similar positions on fiscal policy.

Barr, who has hired Ross Perot's former campaign manager, acknowledged that some Republicans have tried to discourage him from running. But he said he's getting in the race to win, not to play spoiler or to make a point. Barr first must win the Libertarian nomination at the party's national convention that begins May 22. Party officials consider him a front-runner thanks to the national profile he developed as a Georgia congressman from 1995 to 2003.

If he wins the White House, he said he would immediately freeze discretionary spending in Washington. He also would begin withdrawing troops from Iraq and consider slashing spending at federal agencies such as the departments of education and commerce — as well as at overseas military bases.

The former U.S. attorney also said he would strictly enforce immigration laws.