GOP super PAC targets Mo Brooks for past anti-Trump remarks

A top GOP super PAC with ties to Senate Majority Leader Mitch McConnell (R-Ky.) is targeting Rep. Mo BrooksMorris (Mo) Jackson BrooksGOP lawmaker blasts Omar and Tlaib: Netanyahu right to block 'enemies' of Israel Conservatives call on Pelosi to cancel August recess Overnight Defense: Woman accusing general of sexual assault willing to testify | Joint Chiefs pick warns against early Afghan withdrawal | Tensions rise after Iran tries to block British tanker MORE (R-Ala.) in the Senate GOP primary race in Alabama.

The Senate Leadership Fund released an ad Wednesday going after Brooks ahead of the August primary to fill the seat previously held by Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsHouse Democrats seeking Sessions's testimony in impeachment probe McCabe's counsel presses US attorney on whether grand jury decided not to indict US attorney recommends moving forward with charges against McCabe after DOJ rejects his appeal MORE.

The ad splices together clips of Brooks speaking out about then-GOP presidential candidate Donald TrumpDonald John TrumpHarris bashes Kavanaugh's 'sham' nomination process, calls for his impeachment after sexual misconduct allegation Celebrating 'Hispanic Heritage Month' in the Age of Trump Let's not play Charlie Brown to Iran's Lucy MORE while attempting to tie him to House Minority Leader Nancy Pelosi (D-Calif.) and Sen. Elizabeth WarrenElizabeth Ann WarrenGun control: Campaigning vs. legislating Booker defends middle-ground health care approach: 'We're going to fight to get there' Democrats spar over electoral appeal of 'Medicare for All' MORE (D-Mass.).

"Mo Brooks attacked President Trump, siding with them — not Alabama conservatives," a narrator says in the ad, which portrays Brooks alongside the Democratic figures.

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The Republican lawmaker repeatedly attacked Trump during the GOP primary, saying he couldn't be trusted and calling him a "serial adulterer."

Since Trump won the election, Brooks has become a vocal supporter of the president. 

On Monday, Brooks released a new Senate campaign ad that said if he is elected, he will fight to have Trump's U.S.-Mexico border wall funded, even if that means a government shutdown.

But his past criticisms of Trump could pose a problem for him in the race in Alabama, a state which Trump won handily in last year's presidential election.

The GOP super PAC ad, titled "Trust," is part of the group's $2.5 million ad campaign in Alabama’s upcoming special election. 

Steven Law, the head of the Senate Leadership Fund, said the special election will be a "test" to see if an "anti-Trump" candidate can win. 

"The Republican primary for U.S. Senate in Alabama will be the first test to see whether someone as stridently anti-Trump as Mo Brooks can survive in a state that is so overwhelmingly supportive of the President,” Law said in a statement.

The primary is scheduled for Aug. 15, and it will be followed by a runoff in late September and a general election in December.

Brooks is one of several candidates in the primary challenging Sen. Luther Strange, who was appointed to the seat earlier this year by then-Gov. Robert Bentley (R).

A Brooks campaign spokeswoman did not immediately return a request for comment.