Fresh off his Ohio Senate primary win, Republican nominee J.D. Vance is slated to appear at a Trump rally for Dr. Mehmet Oz in Greensburg, Pennsylvania, on Friday.

Vance’s appearance comes as polls indicate Oz and Pennsylvania GOP Senate hopeful David McCormick remain in a heated battle for the Republican nomination in the Keystone State.

“President Donald J. Trump, 45th President of the United States of America, is proud to announce J.D. Vance, Republican Nominee for U.S. Senate in Ohio as a Special Guest Speaker in Greensburg, Pennsylvania,” Trump’s Save America PAC said in a statement.

TRUMP ENDORSES DR. OZ IN PENNSYLVANIA SENATE PRIMARY

The former president endorsed Oz, a longtime TV personality, in early April, with Trump praising his celebrity status as “brilliant and well-known.” On Tuesday, Vance overcame a batch of Trump enthusiasts to claim the Ohio Republican Senate nomination.

Vance won't be the only out-of-state candidate at the Pittsburgh-area rally. Rep. Alex Mooney (R-WV) will participate. West Virginia is losing one of its three House seats due to redistricting, and Mooney has been thrown into a district with fellow Republican David McKinley.

Also appearing will be a pair of House Republicans from Pennsylvania, Reps. John Joyce and Mike Kelley. Conservative commentator Dinesh D’Souza, My Pillow CEO Mike Lindell, and Pennsylvania House candidate Jim Bognet are also set to appear.

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Trump allies have argued his endorsement of Vance indicates the former president still has a grasp over the GOP’s electorate. Vance climbed significantly in the polls following Trump's announcement of support.

The McCormick campaign has also touted his support of Trump and dismissed the need for his endorsement, highlighting his backing from Trump administration alumni including former White House counselor Kellyanne Conway and former Secretary of State Mike Pompeo.