JEFFERSON CITY — The Latest on the Missouri primary election (all times local):

9:30 a.m.

Election officials in Missouri's largest cities are reporting a steady stream of voters, though some poll workers didn't show up for Tuesday's primary elections. 

Election directors in Kansas City and St. Louis said they each had about a couple dozen workers who were no-shows when the polls opened at 6 a.m. Tuesday. They attribute that partly to concerns about the coronavirus, which has been surging in Missouri in recent weeks. In both cities, substitutes were on stand by and were quickly dispatched. 

Voters are deciding whether to expand Medicaid health care eligibility to thousands more low-income adults. They also are picking party candidates for governor, U.S. Congress, the state Legislature and various county offices. 

Local election authorities had projected a statewide voter turnout of nearly 37%.

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6 a.m. 

Polls have opened for the Missouri primary. 

Voters can cast ballots from 6 a.m. to 7 p.m. Tuesday. Voters in line when polls close at 7 p.m. can still cast ballots. 

Missouri voters will decide whether to expand Medicaid health care eligibility to thousands more low-income adults and also will pick the Democratic and Republican candidates for governor, U.S. Congress and the state Legislature. 

Republican Gov. Mike Parson is expected to win his primary and go on to defend his seat in November. Auditor Nicole Galloway is also expected to win the Democratic primary. 

Other key races include a primary for St. Louis Circuit Attorney Kim Gardner's seat.