Republican Rep. Ashley Hinson is expected to win her party’s nomination to succeed Sen. Joni Ernst, who decided to retire after two terms. On the Democratic side, state Sen. Zach Wahls and state Rep.

The state could have four battleground congressional races in the fall, as Republican Reps. Brian Fitzpatrick (1st District), Ryan McKenzie (7th District), Rob Bresnahan (8th District) and Scott Perry ...