Dr. Oz’s Heritage Is Targeted as Rivals Vie for Trump Backing

Just as he is doing in two other crowded Republican primaries, in Ohio and Missouri, Mr. Trump is not picking sides while the field remains muddled. In both those states, he has also met with multiple candidates vying for his backing.

Rob Gleason, a former chairman of the Pennsylvania Republican Party, said a Trump endorsement in the state’s race “could be the tipping point in a close election.

“He’s just very important in Republican circles,” he said. “He still is.”