Vice President Pence is reportedly slated to travel to his home state of Indiana later this month as the Trump administration makes its case for tax reform.

Pence is set to visit the Hoosier State on Sept. 22, a senior administration official told Politico, which reported he will seek to put pressure on Sen. Joe Donnelly Joseph (Joe) Simon DonnellyMomentum growing among Republicans for Supreme Court vote before Election Day Barrett seen as a front-runner for Trump Supreme Court pick Ex-Sen. Joe Donnelly endorses Biden MORE (D-Ind.), who will be defending his hotly contested seat in the 2018 midterm elections.

Donnelly has walked a fine line between his own party and the Trump administration, joining only two other Democrats in not signing the party's conditions for tax reform.

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The Democrat is also one of three members of his party who voted to confirm conservative Supreme Court Justice Neil Gorsuch.

The White House has taken aim at other vulnerable Democrats up for reelection in 2018 in recent visits by President Trump.

Trump visited North Dakota this week, where Sen. Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (D) is up for reelection next year.

"Sen. Heitkamp. Everyone's saying, 'What's she doing up here?' But I'll tell you what — good woman, and I think we’ll have your support, I hope we’ll have your support. Thank you very much, senator," Trump said at his rally on Wednesday.

However, not all vulnerable Democrats have received the same treatment as Heitkamp.

Trump targeted Sen. Claire McCaskill Claire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (D-Mo.), who is seeking a third term in the Senate, during a trip to Missouri last month.

“We must lower our taxes and your senator, Claire McCaskill, she must do this for you, and if she doesn’t, you have to vote her out of office,” Trump said during a rally.

The president has also targeted McCaskill on Twitter.