Top GOP Candidates Move On To New Hampshire

Mitt Romney, who squeaked past Rick Santorum to win the Iowa caucuses Tuesday night, painted Santorum as a career politician but otherwise signaled little change in his message or strategy when he spoke on ABC's Good Morning America.

Also Wednesday, Romney wins the endorsement of John McCain in New Hampshire, a sign that the Republican establishment is getting behind Romney. But analysts say he'll still have to watch his back, despite his commanding lead in polls in New Hampshire.

Santorum plans to talk less about his social conservatism and more about jobs and the economy. And third-place candidate Ron Paul can't be counted out in independent-minded New Hampshire, nor is Newt Gingrich giving up, despite a fourth-place finish last night. Gingrich sounded angry when he told MSNBC that the Iowa results proved that three out of four Republicans "repudiated" Romney.

While the candidates are focused on New Hampshire right now, Dante Scala, political science professor at the University of New Hampshire, says that the South Carolina primary could be the real test.

Scala points out that conservatives are still looking for a candidate to line up behind, and the question is whether they will finally unite behind Romney.

"If Romney loses South Carolina, despite his organizational and financial advantages, that would mean it will be a huge slog throughout the rest of the primary season," Scala said.