Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE leads Sen. Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE (R-Texas) by double digits in the race for the GOP’s 2016 presidential nomination nationwide, according to a new poll.

Trump has a nearly 20-point edge over Cruz in the latest NBC News/Survey Monkey poll, which comes less than three weeks before Iowa's first-in-the-nation caucuses.

ADVERTISEMENT

The outspoken billionaire remains the front-runner for the Republican nomination, with 38 percent, pollsters said. Cruz is second, with 20 percent, while Sen. Marco Rubio (R-Fla.) takes third, with 11 percent.

No other Republican White House hopeful registers double-digit support in Tuesday’s results. Retired neurosurgeon Ben Carson is fourth with 9 percent.

Former Gov. Jeb Bush (R-Fla.), Gov. Chris Christie (R-N.J.) and Sen. Rand Paul (R-Ky.) are deadlocked in fifth place, with 3 percent apiece.

About 5 percent do not know yet who they are voting for in the GOP’s 2016 presidential primary. Another 1 percent have no answer.

Tuesday’s results also show that voters are generally decisive about their top candidate heading toward Iowa.

Approximately 40 percent said they are “absolutely certain” who they will in 2016. An additional 39 percent said there is a “large chance” they will stick with their current choice.

Roughly 18 percent are 50-50 on their candidate, while 2 percent say there is a “small chance” they will stick with their contender.

NBC News and Survey Monkey polled 2,852 registered Republican voters Jan. 4–10. The findings, released early Tuesday, have a 2.4 percent margin of error.