Presidential candidate Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE is enjoying his largest lead over the GOP field following Tuesday's presidential debate, a new poll finds.

The post-debate survey from Public Policy Polling (PPP) released Friday shows the real estate mogul with 34 percent support nationally among GOP voters, up 8 points from a mid-November poll.

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Trump's favorability has also grown. He's rated at 51 percent favorable, 37 unfavorable; an improvement over his 51-37 split in November.

“As the year comes to a close Donald Trump is just getting stronger,” Dean Debnam, president of PPP, said in a statement.

“His support for the nomination is growing but so is his overall favorability which suggests his ceiling could be higher than often assumed.”

Sen. Ted Cruz Rafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE (R-Texas) sits in second place, with 18 percent support, followed by Sen. Marco Rubio Marco Antonio RubioOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats step up hardball tactics as Supreme Court fight heats up Press: Notorious RBG vs Notorious GOP MORE (R-Fla.), with 13 percent. But Cruz’s lead grew 4 points since the November poll, while Rubio remains stagnant.

“Ted Cruz is getting stronger while Marco Rubio stays in place,” Debnam said. “There’s a long way to go but it’s become pretty clear over the last few weeks who the main rival to Trump is at least for now.”

The next tier of GOP candidates all poll in the single digits. Former Florida Gov. Jeb Bush gets 7 percent, followed by retired neurosurgeon Ben Carson, at 6 percent.

Carson has taken one of the biggest tumbles, dropping from 19 percent in the November poll. Following the terror attacks in Paris and California, Carson has struggled to demonstrate his national security bona fides and is sinking in the polls.

New Jersey Gov. Chris Christie is at 5 percent and former Hewlett-Packard CEO Carly Fiorina and former Arkansas Gov. Mike Huckabee both have 4 percent support. The rest of the candidates register at 2 percent or less.

On the Democratic side, Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE saw a slight drop of 3 points since the November poll, but maintains her lead over Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.), 56 to 28 percent. Former Maryland Gov. Martin O’Malley trails, with 9 percent.

The poll was conducted from Dec. 16 to Dec. 17, following the Dec. 15 GOP debate. PPP surveyed 532 GOP primary voters and 525 Democratic primary voters via phone and Internet. The margin of error is 4.3 percent.