Only a couple of days away from the Republican debate, three new national polls have been released on voter presidential preference. I don't know if they'll be used to determine who gets to participate in the GOP debate (only Fox News knows that), but they could since all are fairly respected surveys.
The NBC News / Wall Street Journal Poll was done between July 26th and 30th of a random sample of 252 Republicans, and has a margin of error of 6.17.
The Quinnipiac University Poll was done between July 23rd and 28th of a random national sample of 710 Republicans, with a margin of error of 3.7 points. They also surveyed 681 Democrats about their presidential preferences, and that had a 3.8 point margin of error.
The Monmouth University Poll was done between July 30th and August 2nd of a random national sample of 423 registered Republican voters, and has a margin of error of 4.8 points.
While the numbers are different in the three GOP polls, they all agree on one thing -- there are only three major candidates, with Trump leading and Bush/Walker fighting for second. All other candidates trail these three by a significant margin.
The chart below shows the results of the Democratic part of the Quinnipiac survey. It contains no surprises. Hillary Clinton has a 38 point lead over Bernie Sanders, and a 42 point lead over Joe Biden. O'Malley and Webb each got a single point, while Chafee couldn't even do that.
