Ben Carson leads Donald Trump nationally for first time

Ben Carson has overtaken Donald Trump in national polling for the first time since the businessman entered the race.

The retired neurosurgeon edged out Trump in a new CBS News/New York Times survey of Republican primary voters, released Tuesday.

Carson earned 26 percent of the vote, while Trump garnered 22 percent — within the margin of error of 6 percentage points.

Support for Carson has quadrupled in the poll since August.