Guinta, the last member of New Hampshire's GOP delegation to endorse, said he expects to make an announcement Sunday afternoon.
CONCORD, N.H. — Romney's rivals launched a Hail Mary effort to undercut him during Sunday's GOP debate in New Hampshire.
Gingrich refused to recant his claims that Romney is lying about ties to a super-PAC running ads in early-voting states.
Mitt Romney and Rick Santorum defended their stance on gay rights during Sunday's GOP presidential debate.
The knives were out against Mitt Romney in the first few minutes of Sunday morning's Republican presidential debate.
Candidates and their campaigns did their best to turn out support outside the site of Sunday's GOP debate.
Conservative Christian leaders hope to avoid a repeat of 2008, when their movement fractured, denying favorite Huckabee the nomination.
McCain, the GOP’s 2008 presidential nominee, will join Romney in the Granite State on Wednesday.
The veteran political analyst and columnist for The Hill says he would not be surprised to see Santorum win.
Candidates have only hours left to win over voters, 40 percent of whom are undecided, according to some polls.