Of all the arguments the Democratic establishment has thrown out against Bernie Sanders’ candidacy, perhaps the most recurring one revolves around electability. “Sure, you agree with him,” they argue, “but he can’t win.”

A just released CNN poll finds Sanders out-polling all of the GOP’s major candidates, though pretty much tied with Jeb Bush. Here’s how Sanders stacks up:

SANDERS: 48%
BUSH: 47%

SANDERS: 48%
WALKER: 42%

SANDERS: 59%
TRUMP: 38%

If you limit the poll sample to just registered voters, Bush defeats Sanders by a single point. Either way, this credible poll suggests that Sanders is not just some pie-in-the-sky general election candidate. His more uphill battle may be the primary. But even there, he has some strengths. Polling out last week shows he’s the only candidate from either side who has a net favorability rating.