MS NOW

Tuesday primaries: What to watch as voters head to the polls

Voters in six states will head to the polls Tuesday to cast ballots in primary races that are critical for setting matchups for the November midterms.

Allyson Schwartz
U.S. Rep. Allyson Schwartz, candidate for the Democratic gubernatorial nomination in Pennsylvania steps from the booth after voting Tuesday, May 20, 2014, in Jenkintown, Pa.AP