During a wide-ranging interview over the weekend, Bernie Sanders told ABC’s George Stephanopoulos that he thought Hillary Clinton was “jumping the gun” when she said recently that she was undoubtedly going to be the Democratic nominee.

Sanders pointed to his recent victories in Oregon, West Virginia and Indiana as evidence that Clinton was getting ahead of herself and added, “We’re going to have to do very, very, very well in the remaining nine contests. I think we have a shot.”

Sanders would need to win 67 percent of the remaining pledged delegates to pull ahead of Clinton on that front, and a new ABC News poll shows that a whopping 20 percent of Sanders’ voters say they would back the Republican presumptive nominee over Clinton.

Stephanopoulos asked Sanders if he was confident he could convince his supporters to back Clinton over Donald Trump should he not secure the nomination. Sanders argued that it was incumbent upon Clinton to win over his supporters.