Joni Ernest won the Republican primary for US Senate in Iowa and now has a chance to take a Democratic-held seat. With viral Internet ads, a compelling story, and good shooting aim, she's united the tea party and GOP establishment behind her.
Tea party Republican Chris McDaniel barely leads Sen. Thad Cochran in the Mississippi primary, with the race perhaps heading to a June 24 runoff. If Mr. McDaniel wins, Democrats hope he could implode like other tea party candidates have.
Mitt Romney returned to Iowa for the first time since 2012 to help US Senate candidate Joni Ernst. She also has support of the Senate Conservatives Fund, Sarah Palin, and mainstream Republican leaders.