By CBS3 Staff

PHILADELPHIA (CBS) — Pennsylvania’s US Senate race in the Republican primary is still too close to call on Friday morning. With close to 99% of precincts reporting, Dr. Mehmet Oz is about 1,000 votes ahead of Dave McCormick. 

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If there’s less than a half-a percent difference in the final vote count between the candidates, which appears likely, it will trigger an automatic recount.  

Philadelphia election officials expect the city’s ballot tally to be completed sometime Friday.