Koch-funded groups spending $1.6 million against Baldwin

MADISON, Wis. (AP) — Two groups that are part of the network run by Kansas billionaire Charles Koch are launching a combined $1.6 million in new attack ads against Democratic Sen. Tammy Baldwin.

The new television and digital ads announced Wednesday come from Concerned Veterans for America and Americans for Prosperity-Wisconsin. Each said they were spending $800,000 a piece on the spots.

That brings the total the groups have spent in the race against Baldwin to more than $6 million.

Baldwin faces Republican state Sen. Leah Vukmir in the election. Vice President Mike Pence is coming to Milwaukee on Thursday to host a fundraiser for Vukmir.

The Center for Responsive Politics says more than $19 million has already been spent by outside groups in the Wisconsin Senate race, making it one of the most expensive in the country.