ANNAPOLIS, Md. (AP) — Maryland voters are selecting nominees for the U.S. Senate seat held by Sen. Barbara Mikulski for 30 years, including a Democratic contest that has become a polarizing battle over race and gender. Republicans, meanwhile, are hoping to ride GOP Gov. Larry Hogan's popularity in November to pick up a crucial seat in a state where they are outnumbered by Democrats 2-1. Van Hollen has been running on his record as a pragmatic progressive who is able to reach across the political aisle to get things done.