Washington (CNN) Republican presidential front-runner Donald Trump is building on his national lead among GOP voters, according to a New York Times/CBS News poll released Thursday morning.

But many voters expressed fear or concern at the idea of a Trump presidency -- or a Hillary Clinton one.

Trump is dominating the GOP pack with 35% support, according to the new poll . Texas Sen. Ted Cruz and retired neurosurgeon Ben Carson trail him with 16% and 13% support respectively.

But the new national poll also found that 24% of all voters showed "concern" and 40% expressed "fear" over what Trump would do were he to win the White House next year.

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