According to a new Quinnipiac University poll, presidential nominee Donald Trump is now the undisputed leader of the Republican presidential. Hillary Clinton, meanwhile, now has a 2-to-1 lead over Bernie Sanders in the Democratic race. Trump has 27% support from likely GOP primary voters nationwide in a survey released Wednesday. He’s followed by a second tier that’s bunched closely together: Florida Senator Marco Rubio is at 17% while Texas Senator Ted Cruz and neurosurgeon Ben Carson are at 16% each. Former Florida Governor Jeb Bush has 5% support and no other candidates top 3%. It’s a major drop for Carson, who a month ago was neck-and-neck with Trump, at 23% and 24% respectively. Among Democrats, Clinton’s lead is now 60% to Sanders’ 35%, an improvement for the former Secretary of State over an early-November Quinnipiac poll, which showed her leading 53% to 35%. Former Maryland Governor Martin O’Malley has 2% support. The poll also shows that general election voters more broadly have shifted their support from the Republican candidates toward Clinton and Sanders as well. Clinton beats Trump in a head-to-head competition, 47%-41%. She beats Rubio 45%-44%, Cruz 47%-42% and Carson 46%-43%. Sanders does as well or better in head-to-head match-ups with Republicans, leading Trump 49%-41%, Rubio 44%-43%, Cruz 49%-39% and Carson 47%-41%. Both of the front-runners have a problem with trustworthiness. Clinton is perceived by 60% of American voters as untrustworthy, compared to 36% who say she is trustworthy. Trump’s numbers, meanwhile, are 59% to 35%. The poll was conducted November 23rd -30th, an unusual period for pollsters because includes the Thanksgiving holiday, when those surveyed are less likely to answer their phones. A total of 1,453 American voters were surveyed, with a margin of error of plus or minus 2.6 percentage points. The poll includes 672 Republicans, with a margin of error of plus or minus 3.8 points, and 573 Democrats, with a margin of error of plus or minus 4.1 points.