Six states hold primary elections on Tuesday, with the most attention on California and Iowa. Key races include the California governor's race, where Democrats Xavier Becerra and Tom Steyer lead, and Republican Steve Hilton; Iowa's open governor's race; and competitive congressional contests in New Jersey and Montana.
- California's top-two primary will decide gubernatorial contenders and shape five new Democratic-leaning districts. - Iowa Republicans choose a governor nominee, with Trump-endorsed Randy Feenstra facing a challenge from Zach Lahn.
- Iowa Democrats pick a Senate candidate to challenge Republican Ashley Hinson. - New Jersey's 7th District and Montana's open Senate and House seats are also competitive.
These races could determine control of Congress in November, with Democrats needing to flip seats in Republican-leaning states.