6 in 10 Republicans say Trump likely nominee

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More than six in 10 Republican-leaning voters expect Donald TrumpDonald TrumpConway says she'll talk to Trump about press safety Helen Mirren gives advice for being a ‘nasty woman’ Gingrich goes off on Megyn Kelly over Trump allegations: 'You are fascinated with sex' MORE to be the GOP presidential nominee, according to a new poll.

Sixty-four percent surveyed for the latest ABC News/Washington Post poll released Tuesday say that Trump is likeliest to be the GOP nominee, up 25 points from from November.

Meanwhile, just 12 percent say that rival Ted CruzTed CruzThe Trail 2016: An important lesson in geography Webb: The race to 270 Potential Cruz challenger: 'Don't close off your options' MORE is most likely to win the nomination, while 5 percent say Marco RubioMarco RubioThe Trail 2016: An important lesson in geography Clinton takes aim at Rubio in Florida rally Dem Senate hopeful dodges leaked Clinton emails at debate MORE is likeliest to be the nominee.

Trump is battling Cruz in Iowa, where the two are essentially tied in polls ahead of ballots being cast on Monday. Votes will be cast in New Hampshire Feb. 9.

The survey of GOP-leaning voters was conducted Jan. 21–24 via landlines and cellphones with a margin of error of 5.5 points.