Hillary Clinton and Donald Trump devoted large portions of their Tuesday night victory speeches to wooing Bernie Sanders supporters. Where Berners end up may hinge on how much they buy into Sanders’s arch-narrative, in which the country is in the dumps, the nation’s politics are rigged, trade deals have hollowed out the middle class, election results are illegitimate, a variety of imagined grievances are valid and the system needs to be bashed up.

Even though Berners support a man calling for a revolution, Clinton appealed to their good sense. She warned that Trump would be excessively risky, once again calling him “temperamentally unfit to be president.” She also promised Sanders supporters what she has all year: incremental progress. “We all want an economy with more opportunity and less inequality” and to get “unaccountable money out of politics,” she said, stressing broad areas of policy agreement between her and Sanders. This was a cordial way of arguing that Berners who really care about progressive policy and harbor any sense of practicality have no other place to go.

By contrast, Trump appealed to the worst aspects of the Sanders phenomenon. He argued that the Democratic Party stole the election from Sanders, inflating Berners’ sense of grievance. He attacked globalization, describing a bleak economic picture caused, in his telling, by trade and immigration. He blamed traditional politicians, who, he said, keep the system “totally rigged.” Fixing it all will be easy: Just vote for him.

Sanders left this opening wide for Trump. He has spent months campaigning on a simple, certain, black-and-white story about bad guys and good guys, arguing that the political system and the press are corrupt and that it all requires massive disruption. Now he says he wants to stop Trump, because apparently the system only needs to be shaken up if Sanders is the one doing the shaking. If Sanders is serious about blocking Trump, he does not just have to accept reality and leave the race. He has to hope that his simplistic, irresponsible message did not sink in too far.