Three states hold notable primary contests Tuesday: has statewide primaries, while and Alabama have runoffs.
In Alabama, the key runoff is for U.S. Senate, where Katie Britt and Rep. Mo Brooks square off in the Republican race. Former President Donald Trump has endorsed Britt in the runoff, after he his endorsement of Brooks in March.
In last month's , Britt received 44.8% of the vote to Brooks' 29.1%.
Polls in Alabama close at 7 p.m. local time, 8 p.m. ET.
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