“Joe Biden is no Hillary Clinton, it’s not even close,” says Rep. Ro Khanna of California, a co-chairman of Sanders’ campaign. “Hillary Clinton’s far more talented, had a far stronger base. And the polling suggests that. … There is no one with half the strength of Hillary Clinton in this field.”

“I think the race will then come down to Bernie Sanders versus the conventional candidate that the established interests support, to deny him the nomination,” Khanna adds. “There will be a number of candidates fighting for that role.”

Yet while the horse-race polling is heartening for Sanders, there are underlying sentiments that signal trouble ahead. Democrats want experience, but also someone under the age of 70, a national Morning Consult survey revealed. And a CNN survey found that just a third of Democrats chose Sanders as their best shot at winning in 2020. Fifty-six percent of Democrats named someone else.

“Bernie, with his universal name ID, has little room to grow.” wrote Markos Moulitsas, founder of the liberal website The Daily Kos.