Jon Huntsman dropped out of the GOP presidential race today, but that still leaves five candidates for Republicans in South Carolina to choose from. Mitt Romney is ahead in recent polls and is coming off victories in Iowa and New Hampshire earlier this month. A win in South Carolina on Saturday could go a long way to solidifying his status as a presumptive nominee. But first he has to get through a gauntlet of debates. Tonight's debate in Myrtle Beach, sponsored by Fox News, The Wall Street Journal and the South Carolina GOP, will be a final opportunity for the likes of former House Speaker Newt Gingrich, former Pennsylvania Sen. Rick Santorum, Texas Gov. Rick Perry and Texas Congressman Ron Paul to slow Romney's momentum.

Click below for live commentary and analysis from ABC News and Yahoo News when the debate starts at 9 p.m. ET.