The FDU poll of 825 Registered voters reflects an exceptionally broad base of electoral support for candidate Donald Trump.

[…] Twenty-six percent of registered Republicans say they would vote for Trump if the election were held today with similar numbers (22%) identifying Carson as their candidate of choice. No other candidate achieved double digit status in the poll, with many “Establishment” candidates mired in the single digits. For example, former Florida Governor Jeb Bush and New Jersey Governor Chris Christie — both early frontrunner contenders — attract the support of seven and three percent of registered Republicans, respectively. Former CEO of Hewlett-Packard Carly Fiorina, the sole woman amongst the crowded field, garners seven percent.

[…]  The most recent survey by Fairleigh Dickinson University’s PublicMind was conducted by telephone from October 1-5, 2015 using a randomly selected sample of 824 registered voters nationwide. One can be 95 percent confident that the error attributable to sampling has a range of +/- 4.1 percentage points  (link)