“I think what Joe’s victories on Super Tuesday showed is that he is building the kind of coalition that I had basically,” she told Zakaria. “It’s a broad-based coalition. I finished, you know, most of the work I needed to do for the nomination on Super Tuesday, and then it kind of lingered on, and I think Joe is on track to doing exactly the same thing: putting together a coalition of voters who are energized.“

Clinton has been critical of Sanders throughout the campaign, but those earlier remarks were made when there was a range of other candidates in the field. As Zakaria noted Sunday, the only other notable Democrat still in the field is Hawaii Rep. Tulsi Gabbard.

Clinton also said she hoped that if Sanders doesn’t get the nomination that he and his supporters would back Biden.

“I hope so because his failure and the behavior of a lot of his top aides, and certainly many of his supporters — up to the convention, at the convention, and even up to Election Day was not helpful,“ she said of the 2016 race.

“I had thought we would unify, that's what we'd always done before and that's what I expected. I certainly tried to do that when I ran against Barack Obama and worked very hard for him.“