Photo: Sam Hodgson for The New York Times; Video: By REUTERS

BURLINGTON, Vt. — Senator Bernie Sanders began “Super Tuesday” by casting a ballot at his polling station in Vermont around 7:30 a.m., saying he is “feeling great” about his prospects.

Mr. Sanders, dressed in a black winter jacket and accompanied by his wife, Jane, came to the Robert Miller Community and Recreation Center, checked in with the station’s staff members, then voted for himself.

“After a lot of deliberation I know that Bernie Sanders here in Vermont got at least one vote,” Mr. Sanders joked. “I was working on my wife. So I probably got two. So we are feeling pretty good.”

Moments later, Mr. Sanders told more than a dozen reporters that he is optimistic about Tuesday’s races in which Democrats vote in 11 states. The senator also repeated a pledge to fight for the nomination until the party’s convention this summer.

“Our hope is that we can win a number of states and in those states where we don’t do well, obviously we want as large a vote as possible,” Mr. Sanders said. “This is a campaign that is going to the Philadelphia convention in July.”

The senator also said Super Tuesday is “an enormously important day” and cast the day as an opportunity to start the political revolution he says is necessary to transform America. He also said, in a now familiar assertion, that he will do well on Super Tuesday if voter turnout is high.

After Mr. Sanders cast his ballot, he stayed to take selfies with several voters. “I will tell you after a lot of thought, I voted for me for president,” a smiling Mr. Sanders told one man after taking a selfie with him.

The man patted him on the back and laughed. “Congratulations Bernie,” the man said. “Good luck out there.”