Manchester – A new New Hampshire poll taken by the American Research Group of Manchester shows Mitt Romney and John McCain in a dead heat. Hillary Clinton's lead over Barack Obama has slipped to 4 percent, which is the poll's admitted margin of error.

The telephone survey of 600 likely voters in each party's primary was done from December 27 to 29.

In the Democratic race, Hillary Clinton's support is down by 7 percent since ARG's December 16 to 19 survey. Obama is up 3 percent, to 24 and John Edwards up 6 percent, to 21. Other candidates trailed badly. Bill Richardson is at 5 percent, Joe Biden and Dennis Kucinich at 3, Chris Dodd and Mike Gravel at 1, with 8 percent undecided.

Among likely GOP voters, McCain and Romney both gained, rising from 26 to 30 percent in the new poll. Mike Huckabee held steady at 11 percent, with Rudy Giuliani losing almost half his support, falling to 9 percent. Ron Paul is at 7 percent, Fred Thompson at 3, Alan Keyes and Duncan Hunter at 1. Undecideds are just 8 percent.

For more detailed survey results, click the links below.

►ARG poll: Detailed GOP results
►ARG poll: Detailed Democratic results
►Rasmussen national poll: Four-way tie for GOP; Clinton leads