Approximately one in three New Hampshire voters remain undecided ahead of Tuesday's Republican presidential primary. As a result, the New Hampshire 2012 Republican debate tonight could play a big role in deciding the state's winner if one candidate gets an edge. Former Massachusetts governor Mitt Romney is the front-runner in New Hampshire according to most polls at the moment -- but that will make him a big debate target tonight, as well, so things could get interesting. 

The debate will be held at St. Anselm College in Manchester, New Hampshire, at 9 p.m. It is sponsored by ABC News, Yahoo! News and WMUR-TV.

The debate will be broadcast on  ABC Saturday night, with a live stream at

Participants in the New Hampshire primary GOP debate include former House Speaker Newt Gingrich, former Utah Governor Jon Huntsman, Rep. Ron Paul (Texas), Gov. Rick Perry (Texas), former Massachusetts Governor Mitt Romney and former Pennsylvania Senator Rick Santorum

Moderators for the event are ABC anchors Diane Sawyer and George Stephanopoulos, joined by WMUR-TV anchor Josh McElveen.

READ: Who Won the New Hampshire 2012 Republican Debate? [POLLS]