The Missouri Secretary of State's Office reported about 32.9 percent of registered voters in the state turned out for Tuesday's primary election - up from about 25 percent during the August 2016 primary.
Final results in Tuesday's state-level elections were made available Wednesday. The secretary of state will certify the results by Aug. 25.
Missouri voters Tuesday approved Amendment 2, expanding Medicaid health care coverage to thousands more low-income adults in the state.
The final vote on Amendment 2 was 53.25 percent in favor (672,967 votes) to 46.75 percent opposed (590,809 votes).
Support for the constitutional amendment means up to 250,000 more adults could be covered by government health insurance beginning in July 2021, according to estimates from the state auditor, the Associated Press reported.
Gov. Mike Parson won the Republican nomination to seek election as governor in Tuesday's primary election - what would be his first election to the position, as he became governor in June 2018 following former Gov. Eric Greitens' resignation.
Parson took 75.04 percent of the Republican vote (510,471 votes), followed by Saundra McDowell's 12.23 percent (83,191 votes), James W. (Jim) McNeely's 8.74 percent (59,451 votes) and Raleigh Ritter's 4 percent (27,197 votes).
State Auditor Nicole Galloway secured the Democratic nomination for governor with 84.63 percent of Democratic votes (453,331 votes). She beat out Democratic candidates Eric Morris with 6.02 percent of votes (32,266 votes), Jimmie Matthews with 3.82 percent (20,458 votes), Antoin Johnson with 3.77 percent (20,169 votes) and Robin John Daniel Van Quaethem with 1.76 percent (9,452 votes).
Parson and Galloway will face unopposed Libertarian nominee Rik Combs, who received 4,161 votes Tuesday, and Green Party nominee Jerome Howard Bauer, who received 858 votes, in the November general election.
In the lieutenant governor race, Republican Lt. Gov. Mike Kehoe secured his first statewide election win - he was appointed to the position by Parson in 2018 - with 59 percent of the Republican vote (355,419 votes). He won against Republican candidates Mike Carter with 26.32 percent of votes (158,550 votes), Aaron T. Wisdom with 8.74 percent (52,680 votes) and Arnie C. AC Dienoff with 5.95 percent (35,842 votes).
Democratic lieutenant governor nominee Alissia Canady took 73.54 percent of the party's vote (370,299 votes), beating Gregory A. Upchurch, who took 26.46 percent (133,216 votes).
Kehoe and Canady will face unopposed Libertarian nominee Bill Slantz, who took 4,090 votes, and Green Party nominee Kelley Dragoo, who earned 856 votes.
Democratic attorney general nominee Rich Finneran won his party's vote with 55.41 percent of votes Tuesday (271,436 votes), beating candidate Elad Gross, who received 44.6 percent (218,473 votes).
Finneran will face incumbent Republican Attorney General Eric Schmitt, who was unopposed in Tuesday's primary and received 601,257 votes, as well as unopposed Libertarian nominee Kevin C. Babcock, who received 4,077 votes.
Incumbent U.S. Rep. Blaine Luetkemeyer, who represents Missouri's 3rd Congressional District, won the Republican nomination to seek re-election with 74.84 percent of the vote (80,585 votes), beating challengers Brandon Wilkinson with 14.76 percent (15,894 votes), Lynette Trares with 3.9 percent (4,193 votes), Jeffrey Novak with 3.27 percent (3,517 votes) and Adela Wisdom with 3.24 percent (3,483 votes).
Luetkemeyer will face Democrat Megan Rezabek - who won her party's nomination Tuesday with 66.9 percent of the vote (27,809 votes) over Dennis Oglesby's 33.15 percent (13,789 votes) - as well as unopposed Libertarian nominee Leonard J. Steinman, who received 626 votes.
Incumbent U.S. Rep. Vicky Hartzler, who represents Missouri's 4th Congressional District, won the Democratic nomination to seek re-election with 76.6 percent of the vote (80,259) over challenger Neal Gist's 23.4 percent (24,511 votes).
Hartzler will face Democrat Lindsey Simmons, who received 38,196 votes in an unopposed election Tuesday, as well as Libertarian Steven K. Koonse, who won his party's nomination with 53.3 percent of votes (356 votes) over Robert E. Smith's 46.71 percent (312 votes).