Among Republicans, Trump has 18% support, followed by former Florida Gov. Jeb Bush with 15%. Wisconsin Gov. Scott Walker has 10% support among Republicans and Republican-leaning independents who are registered to vote. The margin of error is 3.5 percentage points.
Trump's backing has climbed 6 points since a late June poll, while support for Bush and Walker has not changed significantly. None of the other 14 candidates earned double-digit support.
The CNN/ORC poll is the first publicly released national telephone survey to be conducted entirely after Trump's criticism of Sen. John McCain's military record during an Iowa campaign event last weekend, drawing rebukes from other Republicans for saying he didn't think McCain is a war hero.
Among Republican voters, 31% expect Bush will win the presidential nomination, 22% think Trump will win, and 14% predict a Walker victory.
According to the poll conducted July 22-25, most Republican voters say that they want Trump to remain in the race, and that he's the candidate they are most likely to say they want to see on the debate stage.
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