“He’s stuck with a bad environment. He’s stuck with a long incumbency, and he’s stuck with a short general election,” said Tom Russell, a Wisconsin-based consultant with the Democratic Governors Association.

The signs that Walker is ripe to be taken down are everywhere. His opponent, Schools Superintendent Tony Evers, has a slight lead in recent polls and there’s evidence that critical suburban voters are shifting leftward.

Three former Walker aides have even turned on the governor, with two cutting ads for Evers. And Walker has quickly gone negative on Evers, including in a new, highly-charged ad.

Just as important, Democrats are running a populist candidate they believe is made for the moment — Evers, who built momentum from decisively winning a crowded primary and went on to raise $1 million in his first week as the nominee.