Story highlights Donald Trump has a 10-point lead over the GOP field, a new Quinnipiac poll shows

Hillary Clinton has a 2-to-1 lead over Bernie Sanders, the poll shows

Washington (CNN) Donald Trump is now the undisputed leader of the Republican presidential pack, a new Quinnipiac University poll shows.

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 Sen. Marco Rubio is at 17%, while Texas Sen. Ted Cruz and neurosurgeon Ben Carson are at 16% each.

Former Florida Gov. Jeb Bush has 5% support, and no other candidates top 3%.

It's a major drop from Carson, who a month ago was neck-and-neck with Trump, whose lead was then just 24% to Carson's 23%.

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