The governor highlighted his accomplishments, though recent polls show his support in Wisconsin is flagging.

Feingold still leads 47 percent to 42 percent, but that's much closer than the 54-38 margin in April.

The poll is the first since Walker announced his presidential candidacy, but also comes as his national popularity flags.

Democrat Russ Feingold has decided to run for his old Senate seat in Wisconsin against Republican Ron Johnson, who defeated him in 2010.

This is the first Marquette poll conducted after Walker abruptly bowed out of the Republican presidential race last week.

As the Republican governor gets closer to a 2016 presidential bid, he has changed stances on key issues. 

The 2016 presidential contender comes out in favor of the renewable fuel standard, which he previously opposed.