Story highlights Bernie Sanders says Hillary Clinton is getting "a little bit nervous" about the Democratic race

Sanders hit Clinton on trade and health care in an interview Sunday

(CNN) Bernie Sanders says Hillary Clinton is "getting a little bit nervous" about the Democratic presidential race.

"I think she understands that the momentum in this campaign and the energy is with us, and that we have a good chance to win a number of states on Tuesday," Sanders said Sunday in an interview with CNN's Jake Tapper on "State of the Union."

Sanders' comment came when asked about Clinton's charge that Sanders was absent during her push for universal health care as first lady in the early-1990s.

"I always get a little chuckle when I hear my opponent talking about doing it," Clinton said at an event Saturday. "Well, I don't know where he was when I was trying to get health care in '93 and '94, standing up the insurance companies, standing up against the drug companies."

Sanders responded by saying his campaign had found a photo of him standing next to Clinton during those fights.

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