Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.) will hit the campaign trail alongside Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE on Tuesday, according to a new report.

Corker, the chairman of the Senate Foreign Relations Committee, is joining Trump in Raleigh, N.C., NBC News said.

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Corker’s appearance with Trump comes amid rising speculation over the presumptive GOP presidential nominee’s running mate.

Trump on Monday met with Sen. Joni Ernst (R-Iowa), ahead of the billionaire's huddle with the Senate Republican Conference.

Trump also met with Gov. Mike Pence (R-Ind.) over the weekend, fueling rumors he is also on the businessman's vice presidential shortlist.

Reports emerged last week that former Speaker Newt Gingrich and New Jersey Gov. Chris Christie lead the race for joining Trump’s ticket, less than a month before the Republican National Convention.

Trump has previously said he will reveal his pick at the event, but The Washington Post reported last week the announcement may come earlier.