U.S. Senator Joni Ernst introduced a potential major donor to one of her campaign’s fundraisers, who later asked that person for a “an investment of $50,000” in a dark money group backing Ernst’s re-election, Brian Slodysko reported for the Associated Press on December 6.

Slodysko’s scoop uncovered what may be illegal coordination between the Ernst campaign and the Iowa Values group, which can accept unlimited contributions without disclosing donors.

It wasn’t the first time Ernst’s campaign ventured into a gray area.