President 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 late Thursday tweeted support for Rep. Mike Bishop (R-Mich.), a member of the House's tax-writing committee, as he faces a tough reelection race.

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Trump tweeted praise of Bishop's work on the tax-cut law Republicans passed last year and linked the congressman's opponent to House Democratic Leader Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.).

The tweet was a departure from other tweets Trump has made when backing candidates, which tend to focus more on GOP candidates' stances on the military and immigration.

"Congressman Bishop is doing a GREAT job! He helped pass tax reform which lowered taxes for EVERYONE!," Trump tweeted. "Nancy Pelosi is spending hundreds of thousands of dollars on his opponent because they both support a liberal agenda of higher taxes and wasteful spending!"

Congressman Bishop is doing a GREAT job! He helped pass tax reform which lowered taxes for EVERYONE! Nancy Pelosi is spending hundreds of thousands of dollars on his opponent because they both support a liberal agenda of higher taxes and wasteful spending! — Donald J. Trump (@realDonaldTrump) October 4, 2018

Bishop thanked Trump in a subsequent tweet and included a link for people to donate to his campaign.

His Democratic challenger, former Obama administration Defense Department official Elissa Slotkin, has said she won't back Pelosi for Speaker if she wins the seat. She responded to Trump's tweet with a tweet of her own saying that she'll be accountable to Michigan voters rather than Pelosi.

"Mr. President, my name is Elissa Slotkin. I served 3 tours in Iraq w/ CIA, served both GOP+Dem admins and believe in putting my country before anything else," she tweeted. "In Congress, I'll be accountable to Michigan voters -- not Leader Pelosi, not corporate special interests, or anyone else."

Mr. President, my name is Elissa Slotkin. I served 3 tours in Iraq w/ CIA, served both GOP+Dem admins and believe in putting my country before anything else. In Congress, I'll be accountable to Michigan voters -- not Leader Pelosi, not corporate special interests, or anyone else. https://t.co/hWNtWi8m5C — Elissa Slotkin (@ElissaSlotkin) October 4, 2018

The race between Bishop and Slotkin in Michigan's 8th Congressional District is one of a number of key House races that could help to determine which party controls the chamber next year. The nonpartisan Cook Political Report rates the district it a tossup. Trump won the district by almost 7 points in 2016.

A super PAC aligned with Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) recently canceled an ad buy that had been aimed at helping the GOP candidate, but a spokesperson for the super PAC pointed to significant Republican spending currently in the district.

Updated at 12:56 p.m.