Former Alabama Supreme Court Justice Roy Moore has taken a commanding 18-point lead in Alabama's Republican Senate primary runoff, according to a poll released Wednesday.

The Opinion Savvy-Decision Desk HQ poll released Wednesday finds Moore with 50.3 percent support in the state, compared to just 32.2 percent for his challenger, Sen. Luther Strange (R-Ala.).

Moore, who was removed from the state's Supreme Court twice, has seen his lead over Strange swell after coming in first place in last week's primary. Moore won only 38 percent of the vote, compared to 32 percent for Strange.

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A second poll released Sunday by JMC Analytics and Polling showed Moore with a 19-point lead over Strange.

The two candidates will meet in a runoff on Sept. 26.

Moore is leading Strange despite the latter's endorsement from President Trump. Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.) is also backing Strange.

Most of Moore's newfound support seems to have come from supporters of Rep. Mo Brooks Morris (Mo) Jackson BrooksOvernight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' OVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals,' official says MORE (R-Ala.), who came in third place in the initial primary with just under 20 percent of the vote. No other candidates received double digit support during the first round of voting.

Trump hasn't seen his endorsement carry much weight despite his high approval rating in the state. The poll found that 83.4 percent of the state supports the job Trump has done in the White House so far, compared to just 14 percent who disapprove.

Almost 18 percent of voters remain undecided. The runoff will be held on Sep. 26.

The Opinion Savvy-Decision Desk HQ poll contacted 494 people via mobile devices on Aug. 22. It carries a margin of error of 4.4 percentage points.