MANCHESTER, N.H. (AP) — Jon Huntsman may have clawed his way to a third-place finish in New Hampshire, but he must overcome major challenges to remain competitive in the race for the Republican presidential nomination.

The former Utah governor is virtually unknown in South Carolina, which hosts the next presidential contest in just 10 days. Having essentially lived in New Hampshire since October, he has visited South Carolina just twice over the last two months. And with front-runner Mitt Romney already claiming wins in New Hampshire and Iowa, Huntsman has little time or money to improve his standing.