Here is the latest Iowa news from The Associated Press at 3:40 a.m. CDT

DES MOINES, Iowa (AP) — It’s primary day in Iowa, and voters in the state that kicked off the presidential nominating season now are set to choose general election candidates for state offices. The top contest on the primary ballot Tuesday is the Democratic race to choose a challenger for longtime Republican Sen. Chuck Grassley. Candidates also are seeking primary victories in three of Iowa’s four congressional districts and legislative races.

IOWA CITY, Iowa (AP) — Three days after Gov. Terry Branstad called a proposed higher education tuition increase too big, the board governing Iowa’s public universities released a plan Monday that would make it even bigger for some students. The revised Board of Regents proposal would generate $1.2 million in additional revenue by targeting University of Iowa engineering and business school students for larger hikes than their classmates in the coming school year.

SIOUX CITY, Iowa (AP) — Sioux City has approved a 6.65 percent water rate increase over the next three years, beginning July 1. The Sioux City Journal reports that the City Council voted 3-2 to approve the water hike Monday. Under the plan, the average residential water customer would pay an additional $2.27 per month in the first year, $2.39 in the second year and $2.57 in the third year.

IOWA CITY, Iowa (AP) — A man convicted of murder in the fatal shooting a woman in a Coralville mall has been sentenced to life in prison without parole. The Iowa City Press Citizen reports that a judge on Monday handed over the sentence for 23-year Alexander Kozak. A jury in April found Kozak guilty of killing 20-year-old Andrea Farrington at the Coral Ridge Mall on June 12, 2015.