Election clerks across the presidential battleground state of Wisconsin rushed to mail absentee ballots Tuesday, less than 24 hours after the state Supreme Court lifted a temporary freeze on sending them while it considered a legal challenge. “Oh, we're busy,” said Wendy Helgeson, the Town of Greenville clerk who also serves as president of the Wisconsin Municipal Clerks Association. More than 1,850 clerks in municipalities big and small were working to meet a Thursday deadline in state law to