Kathy Barnette

In one of the biggest surprises of the Pennsylvania primary election, television host Dr. Mehmet Oz and former hedge fund CEO David McCormick led the crowded field of Republican candidates for U.S. Senate in a neck-and-neck contest early Wednesday.

Former President Donald Trump’s winning streak in U.S. Senate primaries is on the line Tuesday as voters in five states cast their ballots in midterm elections. Trump backed celebrity heart surgeon Mehmet Oz and state Sen. Doug Mastriano in Pennsylvania's Republican primary for U.S. Senate and governor, respectively.

As Kathy Barnette surges in polling on Pennsylvania’s U.S. Senate race, the national press is descending on her campaign – and the campaign has greeted the attention with some reluctance.

Sensing a threat in Pennsylvania’s U.S. Senate race, Donald Trump has issued a warning that surging Republican candidate Kathy Barnette would upend the GOP’s chances of holding the seat in November. He is urging voters to back his pick, TV’s Dr. Mehmet Oz.

In the two contested primaries for Pennsylvania’s open U.S. Senate seat, money has mattered a lot. But it may not end up being the deciding factor.

Several prominent conservative groups are lining up behind Pennsylvania Republican Senate candidate Kathy Barnette as an alternative to Mehmet Oz, the celebrity heart surgeon endorsed by former President Donald Trump.

What could be the final primary debate between Republicans running for Pennsylvania’s open U.S. Senate seat devolved into a string of attacks.

Pennsylvania candidates for the governor and U.S. Senate seats quickly weighed in on the potential overturning of Roe.

The state’s Senate hopefuls vary widely on the issues of voting rights and democracy.

On the Republican side, voters are more unified on a host of issues, except who they plan to vote for next month. Even Donald Trump’s endorsement of doctor and television celebrity Mehmet Oz appears to have done little to clarify the picture.