And then there were five. Jon Huntsman has become the latest casualty of the race for the Republican presidential nomination, dropping out this morning after a decent, but not overwhelming showing in the New Hampshire primary last week.
In announcing his withdrawal today, he derided the negativity permeating the GOP primary race and immediately threw his support behind Mitt Romney.
"Today, I am suspending my campaign for the presidency," the ex-Utah governor and U.S. ambassador to China said at a news conference in Myrtle Beach, S.C.
"I believe it is now time for our party to unite around a candidate best equipped to defeat Barack Obama. Despite our differences and the space between us on some of the issues, I believe that candidate is Governor Mitt Romney."
Huntsman's support for the one-time Massachusetts governor is not unexpected given Romney's frontrunner status (he won both Iowa and New Hampshire).
There are also issues on which the two men agree, and both are open about their strong Mormon faith, though relations between the two have been frosty of late.
Huntsman, who was polling behind Stephen Colbert in South Carolina, had no path forward and exited not by criticizing Romney, but the "toxic" tone of the race.
"This race has degenerated into an onslaught of negative and personal attacks not worthy of the American people and not worthy of this critical time," Huntsman said.