A Reuters poll released Friday finds that GOP presidential front-runner Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE has dropped 12 points in less than a week, his largest single poll-to-poll drop since he took the primary lead in July.

Trump was still the favorite among 31 percent of Republicans in a rolling Reuters/Ipsos poll conducted from Nov. 23 to Nov. 27, but down from 43 percent support registered on Nov. 22.

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The downtrend comes after a week of controversial comments he made about Muslims living in America, suggesting he would “surveil” mosques to root out domestic terrorist plots.

He also suggested a registered database for U.S. Muslims, which drew comparisons to Nazi Germany’s mandatory registration of Jews.

Retired neurosurgeon Ben Carson Benjamin (Ben) Solomon CarsonState AGs condemn HUD rule allowing shelters to serve people on basis of biological sex Biden cannot keep letting Trump set the agenda The Hill's 12:30 Report: Trump heads to New Hampshire after renomination speech MORE also fell but finished second in the poll with 15 percent support.

Sens. Ted Cruz Rafael (Ted) Edward CruzTrump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE (R-Texas) and 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.) tie for third with 8 percent support each. Former Florida Governor Jeb Bush comes in fifth with 7 percent support.

The five-day rolling average sample ranged from 464 to 347 online respondents and has a credibility interval of 5.2 to 6.1 percentage points.