Wisconsin is holding its primary as scheduled today despite public health concerns from the coronavirus pandemic.
CNN's Omar Jimenez is at a polling site in Milwaukee. A line has formed as voters try to stay apart from each other.
Earlier today, Dr. Jerome Adams, the US Surgeon General, urged Wisconsin voters to maintain a safe six-foot distance from other voters and wear a face cloth or covering as they head to the polls.
"If you're going to exercise your right to vote, do it as safely as possible," Adams told NBC's Savannah Guthrie.
Some background: Every other state with an election scheduled for April postponed their contest or shifted it to by-mail voting only.
But Republicans in Wisconsin who have insisted on holding the election on schedule won two legal battles yesterday, as the state Supreme Court blocked Democratic Gov. Tony Evers' bid to delay it until June and the US Supreme Court reversed a lower court's ruling that gave voters six extra days to return their ballots by mail.