What's next for McCormick-Oz squeaker -- and the possible electoral turbulence of Mastriano as governor

Dr. Mehmet Oz and David McCormick face razor-thin margins in the Pennsylvania GOP Senate race. Doug Mastriano's gubernatorial primary win raises concerns within the GOP.

Many across the country -- and certainly former President Donald Trump -- are watching Pennsylvania.

Ballots are still being counted in the GOP Senate primary race, where razor-thin margins separate hedge fund manager David McCormick and celebrity TV Dr. Mehmet Oz. Meanwhile, a late Trump endorsement in the Republican gubernatorial primary helped boost election denier and state Sen. Doug Mastriano to a win. Both races offer insight -- and raise tough questions -- about the conservative electorate in the Keystone State.

As of Wednesday afternoon, with 98% of votes counted, both McCormick and Oz had roughly 31% -- separated by just about 2,000 votes. Pennsylvania law triggers a recount if a candidate's margin of victory is 0.5% or less, as seems all but certain.

Here's what happening in Senate contest and what to know about the gubernatorial win.