A group backed by billionaire Elon Musk is behind a new set of deceptive attack ads and text messages targeting voters just weeks ahead of the election for a seat on Wisconsin’s Supreme Court.

“This is an all-hands-on-deck final push,” said Ben Wikler, who chairs the Wisconsin Democratic Party, which has been advocating absentee voting more aggressively than Republicans. “If you do it absentee, do it now, do it quickly," said Andrew Hitt, chairman of the Wisconsin Republican Party. The Supreme Court, in a 5-3 decision Monday along ideological lines, affirmed an appellate court ruling that had blocked the extended count. Still, there were 320,000 outstanding ballots as of Tuesday, which amounts to 18% of the nearly 1.7 million absentee ballots requested. In the April presidential primary election, 9% of all requested absentee ballots were not returned.