According to a new NBC News/SurveyMonkey online poll, Donald Trump has the frontrunner spot to himself, with 28 percent support among Republican and independent voters who lean Republican.
Support for Ben Carson, who was tied with Trump in last month's online poll, has fallen off by 8 points and the former neurosurgeon is now tied with Ted Cruz at 18 percent.
Trailing not too far behind is Marco Rubio, at 11percent. Jeb Bush polled at 4 percent and Chris Christie and Carly Fiorina each 3 had percent.
The NBC News/SurveyMonkey poll was conducted nationwide of 5,775 adults, including 2,440 Republican and Republican-leaning voters. Overall results have an error estimate of plus or minus 1.9 percentage points and the error estimate for the leaned Republican voters is plus or minus 2.9 percentage points.