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PITTSBURGH (AP) – Polls have opened in Pennsylvania as voters choose Republican challengers to Democratic Gov. Tom Wolf and U.S. Sen. Bob Casey.

Also on tap Tuesday are contested primaries for lieutenant governor and a slew of crowded U.S. House races following Pennsylvania’s court-ordered redrawing of congressional district boundaries.

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If he’s beaten, Lt. Gov. Mike Stack would become the first officeholder to lose re-election since Pennsylvania allowed lieutenant governors to run for a second term in the 1970s.

Polls will close at 8 p.m.

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Spending in the hotly contested gubernatorial primary has passed $20 million. The sleepier Republican contest for U.S. Senate could play a role come November in deciding whether Republicans maintain U.S. Senate control.

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