Live primary results: Pennsylvania presidential and Senate races
Yahoo -

Tuesday's Pennsylvania primaries will cement the lineup for a high-stakes U.S. Senate race between Democratic Sen. Bob Casey and Republican challenger David McCormick, a contest that is expected to cost hundreds of millions of dollars and could help decide control of the Senate next year. Casey, seeking his fourth term, is perhaps Pennsylvania's best-known politician and a stalwart of the presidential swing state's Democratic Party — the son of a former two-term governor and Pennsylvania’s...

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