Governor Scott Walker dropped fast. According to the conservative Weekly Standard, Walker led the field of GOP presidential hopefuls in April, dropped to second in August, then plummeted to last place in no time flat. Why? Perhaps his campaign collapse proves that conservative voters do not hate the devils of public education as much as Walker (and I) thought.

Maybe school bashing’s not enough…

Walker had built his national reputation on a consistent diet of education-bashing. He famously attacked teachers’ unions. More than that, though, he blasted lazy university professors. Perhaps most uniquely, he himself had never completed college, having dropped out to pursue more worthwhile goals.

Make no mistake. As a voter and a teacher and a lazy college professor, I’m glad to see Walker crumble. But as an historian, I’m surprised. Whatever his faults, I thought Walker had shown some savvy in following a conservative script with nearly a century of success behind it.

SAGLRROILYBYGTH know the story, but for new folks, here’s a quick history lesson: When Governor Reagan was elected president, his first decorating move was to put a large portrait of Calvin Coolidge in the Oval Office. Reagan, after all, modeled himself after Coolidge’s brand of small-government conservatism.

Coolidge had come to national prominence for his stern opposition to a police strike in Boston. Reagan, too, made his bones by combatting an air-traffic controllers’ strike.

I thought Walker could win by using the Coolidge playbook. I thought his union-bashing policies were terrible, but I thought they would win.

We were both wrong. Walker went from conservative hero to zero practically overnight.

Why? There might be education-related reasons other commentators have missed. Maybe GOP voters really don’t hate public-school teachers as much as people think they do. Maybe GOP voters expect their candidate to have a college degree. Could it even be—perish the thought—that voters don’t hate university professors as much as Governor Walker thought they did?

Conservative pundits offer different reasons. Jonathan Last at the conservative Weekly Standard found Walker’s collapse “shocking.” Unlike other meltdowns, Walker’s campaign had suffered no embarrassing gaffes or scandals. Walker had real credentials, so his early front-runner standard was not a fluke. Last concluded that Walker’s loss was likely due to the weirdly broad field of candidates this year and to Donald Trump’s “disruption” of the nominating process.

Over at the progressive Nation, John Nichols focused instead on Walker’s tired and unpopular anti-unionism. As Nichols put it,

A lot of Republican voters work for a living, and a substantial number of them are union members. While grassroots conservatives have been instructed by corporate America’s amen corner in the media to be angry with unions and living wages and teachers and public employees, they have never been so enthusiastic in that anger as the billionaires who seek to build their empires on a foundation of income inequality and wage stagnation.

So Walker’s core message—union busting—never really resonated to the extent that the governor and his strategists imagined it would.

But don’t forget that Walker’s union-busting was only one leg of a broader strategy based in educational culture-war thinking.  He loudly and proudly fought against teachers’ unions, certainly, but also aggressively went after lazy college professors. Even his own story of dropping out of college to do something more important shows a long-term dedication to bucking the educational status-quo.

I admit it. I thought Governor Walker had hit upon a winning program, even if it was a program I didn’t like. In my last book, I argued that Walker’s brand of educational conservatism had proven politically unbeatable time and again. Throughout the twentieth century, it became a winning strategy among conservatives to bash teachers in no uncertain terms.

I thought it would still work, especially in the howling scramble of this year’s GOP presidential contest. But maybe I got it as wrong as Governor Walker did. Maybe that time has passed.