MILWAUKEE — Wisconsin Gov. Scott Walker is in the fight of his life after three statewide victories that made him a Republican hero and at one point a favorite for the White House.

He’s vying for a third term leading a state that President Trump won by less than 1 percentage point in 2016, after winning two terms and beating back a Democratic recall effort. Walker has been a top target for Democrats and labor unions for years, especially after his reforms to public sector collective bargaining, but discontent with Trump may have created the conditions necessary to finally take him out. Just two years ago, Trump was the first Republican presidential candidate to win Wisconsin since Ronald Reagan in 1984.