Wisconsin Gov. Scott Walker greets the crowd at the Freedom Summit, Jan. 24, 2015, in Des Moines, Iowa.
Photo by Mark Peterson/Redux for MSNBC

Walker leads in new poll while Bush conflicts 2016 Republicans

Gov. Scott Walker continued his early peak on Thursday, with another poll putting him in the lead of the crowded Republican field for 2016.

The Wisconsin governor won 18% of the Republican or Republican-leaning voters nationwide in the national Quinnipiac University poll. While there’s still 20 months until the election—a lifetime in politics—the poll indicates that Walker’s early lead remains persistent.

RELATED: Scott Walker signals support for 20-week abortion ban

Just behind Walker is former Florida Gov. Jeb Bush, with 16% of voters. But the same number of voters said they definitely wouldn’t vote for him, too: 16% said they would “definitely not support” Bush for the nomination if he ran.

Trailing Walker and Bush are New Jersey Gov. Chris Christie and former Arkansas Gov. Mike Huckabee with 8% each, but 16% of Republican voters said they “definitely” wouldn’t support Christie for the nomination.

Another early leader, Dr. Ben Carson, ranked fifth, with 7% of Republican or Republican-leaning  voters support. Despite the fact that he’s never held elective office and routinely sparks public outrage with his off-the-cuff remarks, early polls indicate that Carson’s popularity is a powerful force among conservatives.

RELATED: 2016 wild card Dr. Ben Carson takes the stage 

On the left, former Secretary of State Hillary Clinton cleans up, earning 56% of the Democratic or Democratic leaning voters nationwide; Massachusetts Democrat Sen. Elizabeth Warren, who has repeatedly said she will not run, earned 14% and Vice President Joe Biden earned just 10%.

The survey, taken between Feb. 26 and March 2, polled 1,288 self-identified registered voters by landline or cell phone, in English or Spanish depending on voters’ preference.