President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE recorded an automated call Monday supporting GOP candidate Ron Estes, who is running in a Tuesday special election to fill the seat left open by Trump CIA Director Mike Pompeo, according to a Wichita Eagle report.

Trump won the Wichita-area district by nearly 30 percentage points. But with less than 24 hours before the polls open, Republicans have become worried that Democrat James Thompson could lose the race by a closer-than-expected margin or even win the seat — although that outcome is considered unlikely.

The president joins other top politicians who have boosted Estes in the final stretch of the campaign, including Vice President Mike Pence Michael (Mike) Richard PenceGOP short of votes on Trump's controversial Fed pick Pence seeks to boost Daines in critical Montana Senate race The Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy MORE and Sen. Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE (R-Texas).

Republican national committeeman Mark Kahrs told the newspaper that the Estes campaign coordinated with the White House to get the president’s robocall.

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“Hello, this is President Donald Trump, and I have something big to tell you,” Trump says on the recorded call, according to a transcript.

"Ron is a conservative leader who needs it badly. Ron is a conservative leader who’s going to work with me to make American great again. We’re going to do things really great for our country. Our country needs help, Ron is going to be helping us big league. But I need Republicans like Ron Estes to help me get the job done," Trump continues.

Trump says there are few other elections as "important" as this one, and urges eligible voters to support Estes instead of his Democratic rival James Thompson.