Hawaii Rep. Ed Case faces primary challenger and more to watch in today's races

Democratic incumbents in safe districts in New York and Colorado have been ousted so far this year by primary challengers.

Today’s installment of campaign-related news items from across the country.

Tennessee Sen. Marsha Blackburn won Thursday's Republican primary to become the next governor of Tennessee, according to AP and Decision Desk. Blackburn defeated two challengers in the contest, Rep. John Rose and state Rep. Monty Fritts.

Voting concludes Thursday in Tennessee to select the Republican and Democratic candidates who will face off in November’s gubernatorial election. In the reliably red Volunteer State, Sen. Marsha Blackburn (R-Tenn.) and Rep. John Rose (R-Tenn.) are facing off for the Republican nomination. Blackburn has been favored to