Scott Walker has fallen dramatically in the polls, undone for now by the Trump phenomenon.

Numerous pundits, including me, wonder if he can get back up again.

Surveying the Republican field, based solely on current polling, Scott Walker should not even be on Hillary’s radar. But he is. And she just lashed out at him more viciously than she has any other candidate.

Politico reports:

Making her 2015 debut in Scott Walker’s home state of Wisconsin, Hillary Clinton on Thursday unleashed her harshest and most extended diatribe yet against a Republican rival not named Donald Trump, accusing the governor of being a tool of the billionaire Koch brothers.

“It seems to me, just observing him, that Governor Walker thinks because he busts unions, starves universities, guts public education, demeans women, scapegoats teachers, nurses, and firefighters, he is some kind of tough guy on a motorcycle, a real leader,” Clinton said to a packed audience at the University of Wisconsin-Milwaukee. “Well, that is not leadership folks. Leadership means fighting for the people you represent.”

While Clinton frequently criticizes her Republican opponents on the campaign trail, her barbs are rarely so extended or pointed. She also mentioned Donald Trump, Jeb Bush, Marco Rubio, Ben Carson, and Rand Paul on Thursday evening — but Walker faced the brunt of her fire.

“It looks like he just gets his marching orders from the Koch brothers and just goes down the list,” she added.

What gives?

A big part of it is that Democrats are beholden to Big Labor. And there is no one who hates Scott Walker more than Big Labor, and it’s showing up on the campaign trail:

Walker is trying to refocus his campaign on what has worked in the past, and what has worked in the past is taking on public sector unions.

Bloomberg reports, Scott Walker Would Ban Political Union Paycheck Deductions for Federal Workers:

Seeking to reboot his struggling Republican presidential campaign, Wisconsin Governor Scott Walker says he’d weaken the power of federal employee unions, just as he did with the public-sector ones in his home state.

In a speech on Thursday at the alma mater of his political hero, Ronald Reagan, Walker said he would prohibit paycheck deduction for union dues for political activity on his first day in the White House.

“On Day One, I’m going to stop the government from taking money out of the paychecks of federal employees for political union dues because I don’t think any worker in this country should be required to put money into a political fund that doesn’t support candidates that they don’t support,” Walker said.

Walker tweaking and running against Hillary’s base could be a good strategy to propel him back into contention if and when the Trump phenomenon starts to ease.

Walker seems to be enjoying the new-found spotlight:

And this one aimed straight for the heart:

I don’t think Walker can regain his momentum without a little help.

Attacks on Walker from Hillary and Big Labor may be just what the doctor ordered.