Millions of dollars of ads sponsored by outside groups have poured into the race in recent days, most of it supporting Johnson. This week, millions in new advertising to aid Johnson was announced by Americans for Prosperity, backed by the billionaire Koch brothers, and Reform Wisconsin Fund, a super PAC funded by a group bankrolled almost entirely by Afton billionaire Diane Hendricks, co-founder of ABC Supply Co. in Beloit.

Moments after the Marquette poll release, Feingold’s campaign launched a fundraising email to supporters with the poll results in the subject line.

Also Wednesday, the candidates rolled out a slate of TV ads as part of their closing pitch to voters.

Johnson’s campaign debuted two ads: One featuring a seated Johnson speaking into the camera about what Americans share in common. The other ad blasts Feingold for his 34 years in elected office “with very few accomplishments and a lot of broken promises.”