Arkansas is one of six states with a primary election taking place on Tuesday.
Arkansas, Georgia, Idaho, Kentucky, Oregon and Pennsylvania are holding elections in what's being dubbed a mini-Super Tuesday.
In Arkansas, the U.S. Senate race will be fiercely contested — this fall. GOP Rep. Tom Cotton and two-term Democratic Sen. Mark Pryor are unopposed in their primaries.
In Arkansas, voters select candidates to replace the term-limited Democratic Gov. Mike Beebe, with two former congressmen — Democrat Mike Ross and Republican Asa Hutchinson — the best known candidates. Four Democrats are seeking the nomination to challenge Pennsylvania Gov. Tom Corbett, seen as one of the nation's most vulnerable Republican governors.
Former Federal Emergency Management Agency Director James Lee Witt is running unopposed in the Democratic primary for a U.S. House seat in Arkansas. In Pennsylvania, Chelsea Clinton's mother-in-law and former U.S. Rep. Marjorie Margolies seeks to return to the House representing a district northeast of Philadelphia in a four-way Democratic primary.