Former secretary of state Hillary Rodham Clinton has a sizable lead over her potential Democratic presidential primary rivals in New Hampshire, according to a new poll released Monday. But even though the GOP field is considerably more scattered, the survey shows that former Massachusetts governor Mitt Romney could give Clinton a run for her money should both decide to run again.

The Bloomberg Politics/Saint Anselm College poll has Clinton with 62 percent support among Democratic primary voters, a 49-point lead against the second-place finisher, Sen. Elizabeth Warren (Mass.). For her part, Warren takes 13 percent support while Sen. Bernard Sanders (Vt.), an independent who caucuses with Democrats, trails at third, with 6 percent support. Vice President Biden comes in fourth among New Hampshire Democratic voters, taking just 5 percent support.

The GOP primary landscape is significantly less defined but a lot of energy is behind Romney. On a list of candidates, he comes out on top, with 30 percent of likely GOP voters supporting him. In that scenario, Sen. Rand Paul (Ky.) is second, with 11 percent support.

Romney, who won a competitive GOP primary in 2012 but lost in the general election to President Obama, has said that he is not interested in running in 2016 but hasn't completely ruled out the possibility.

When Romney is not listed as a candidate, Paul and New Jersey Gov. Chris Christie tie at 16 percent among GOP primary voters. Former Florida governor Jeb Bush follows, with 14 percent.

Interestingly, Romney seems the best poised to square off against Clinton. In a head-to-head hypothetical matchup between the two, Clinton takes 46 percent to Romney’s 45 percent. Nine percent say they are unsure whom they would vote for. Clinton does much better against Bush; in that situation, 47 percent say they would vote for her while 39 percent say they would vote for him.

New Hampshire is traditionally the first state to hold a presidential primary election. Success among Granite State voters can give candidates momentum through the primaries and into the general election. Because of that, political watchers frequently look to the state for early clues about how presidential races might stack up.

The telephone survey of 989 New Hampshire voters was conducted by landline and cellular telephones between Nov. 12 and Nov. 18. The margin of error is plus or minus 4.4 percentage points.