HARRISBURG, Pa. (AP) - Pennsylvania voters have a lot of races to settle in the primary election, including picking Republican challengers to Democratic Gov. Tom Wolf and U.S. Sen. Bob Casey.
  
Spending in the hotly contested gubernatorial primary has passed $20 million and is Tuesday's marquee race. On the Republican ballot are three people: Laura Ellsworth, a commercial litigation attorney, Paul Mango, a former health care systems consultant, and Scott Wagner, a State Senator from York County.

The sleepier Republican contest for U.S. Senate could play a role come November in deciding whether Republicans maintain U.S. Senate control. 
  
Also on tap 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.
  
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 are open from 7 a.m. to 8 p.m.

(Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)