Donald Trump continues to lead among Republicans in New Hampshire.

The Granite State's GOP primary voters have a history of preferring establishment candidates, and the party's past two nominees, John McCain and Mitt Romney, won the contest in 2008 and 2012, respectively, but 32 percent of GOP supporters in New Hampshire now back the real-estate mogul, a new poll conducted by CNN and Manchester ABC affiliate WMUR revealed. It means that Trump has been able to add another 6-percentage points to his already considerable September lead, the news channel reported.

His closest rival turns out to be Sen. Marco Rubio, R-Fla., who similarly managed to add 5-percentage points since the latest survey. Nevertheless, the Florida senator trails Trump by a whopping 18 points and comes in at 14 percent, according to the poll conducted between Nov. 30 and Dec. 7, among a random sample of 402 New Hampshire Republicans.

New Jersey Gov. Chris Christie came in third at 9 percent, but more than doubled his support after an endorsement from the New Hampshire Union Leader, the state's largest newspaper, WMUR noted.

Former Florida Gov. Jeb Bush was backed by 8 percent, Ohio Gov. John Kasich by 7 percent, Texas Sen. Ted Cruz by 6 percent and former business executive Carly Fiorina and retired neurosurgeon Ben Carson each by 5 percent in the poll, which had a margin of error of plus or minus 4.9 percent, and this put Christie, Bush, Kasich, Cruz, Fiorina and Carson at a statistical tie.

Trump's challengers can still be hopeful, however, because only 18 percent of those polled are committed to their choice, Politico pointed out. Twenty-six percent said they were leaning toward a candidate, and 56 percent cautioned that they still needed time to decide.

The former "Apprentice" star, meanwhile, might need to worry about the 26 percent of New Hampshire Republicans who told pollsters that they not vote for him "under any circumstance," the political publication added.