MANCHESTER, N.H. (AP) -- With the implosion of Herman Cain's campaign amid accusations of adultery and sexual harassment, the once-crowded 2012 Republican presidential field appears to be narrowing to a two-man race between Mitt Romney and Newt Gingrich.
GOP voters have one month before the leadoff Iowa caucuses. Gingrich is showing strength in the latest Iowa poll, while Romney is strong in New Hampshire, site of the first primary.
Romney has maintained a political network since his failed 2008 presidential bid, especially in New Hampshire. Gingrich, whose campaign nearly collapsed several months ago, is relying on his debate performances and the good will he built up with some conservatives as a congressional leader in the 1980s and 1990s.
Gingrich's efforts appear to be paying off in Iowa. A Des Moines Register poll released late Saturday found the former House speaker leading the GOP field with 25 percent support, ahead of Ron Paul at 18 percent and Romney at 16.
Cain's suspension of his campaign Saturday, and Texas Gov. Rick Perry's continued struggles to make headway with voters, have focused the party's attention on Romney, a former Massachusetts governor, and Gingrich, a one-time congressman from Georgia. They offer striking contrasts in personality, government experience and campaign organization.
Their political philosophies and differences are a bit harder to discern. Both men have changed their positions on issues such as climate change. And Gingrich, in particular, is known to veer into unusual territories, such as child labor practices.
Romney has said he differs with Gingrich on child labor laws. Gingrich recently suggested that children as young as nine should work as assistant school janitors, to earn money and learn work ethics.
Cain's announcement in Atlanta offered a possible opening for Romney or Gingrich to make a dramatic move in hopes of seizing momentum for the sprint to the Jan. 3 Iowa caucus. Neither man did. They appear willing to play things carefully and low-key for now.
At a town hall meeting in New York sponsored by tea party supporters, Gingrich declined to characterize the race as a direct contest between himself and Romney. Any of the remaining GOP contenders could stage a comeback before the Iowa caucuses, he said. "I'm not going to say that any of my friends can't suddenly surprise us," Gingrich said.
But once high-flying contenders such as Perry and Rep. Michele Bachmann of Minnesota have not managed to bounce back so far, despite weeks of trying.
Cain's once-prospering campaign was undone by numerous allegations of sexual wrongdoing.
Gingrich, twice divorced and now married to a woman with whom he had an extramarital affair, has been the most obvious beneficiary of Cain's precipitous slide.
But Perry, Bachmann and possibly others are likely to make a play for Cain's anti-establishment tea party backing. Time is running short for them to establish themselves as the top alternative to Romney, who has long been viewed with suspicion by many conservatives.
Fouhy reported from New York.