(CNN) - Mitt Romney became the latest Republican presidential candidate Wednesday to sign the "Cut, Cap and Balance" pledge to slash spending and balance the budget.
He joined fellow candidates Texas Rep. Ron Paul, former Minnesota Gov. Tim Pawlenty, businessman Herman Cain and former Sen. Rick Santorum of Pennsylvania.
The pledge is a litmus test for support of Republican kingmaker Sen. Jim DeMint of South Carolina.
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- CNN Political Reporter Jim Acosta contributed to this report.