Senator Bernie Sanders of Vermont will have breakfast with the Rev. Al Sharpton in New York on Wednesday, a meeting that underscores Mr. Sanders’s push to strengthen his support among black voters.

Coming a day after the New Hampshire primary, the meeting is part of Mr. Sanders’s strategy to garner more black support, especially in Nevada and South Carolina, demographically diverse states that are both holding nominating contests this month.

Mr. Sharpton and Mr. Sanders will meet at Sylvia’s, the same Harlem restaurant where Mr. Sharpton met Senator Barack Obama during the 2008 presidential campaign.

Mr. Sharpton hosts a show on MSNBC and is the president of the National Action Network. While he has not said whether he will endorse Mr. Sanders, the optics of the meeting could help Mr. Sanders in his efforts to earn more black votes.

Mr. Sharpton told The Daily Beast that candidates were mistaken if they believed they could sew up the nomination without reaching out to black voters of every age, and without connecting with young social justice activists and civil rights leaders.

“You cannot appoint our leadership for us,” Mr. Sharpton told The Daily Beast. “We are not monolithic. They have to talk to us trans-generationally.”

Mr. Sanders’s rival for the Democratic nomination, Hillary Clinton, continues to enjoy a big lead in national polls among black voters. Recently though, Mr. Sanders has made some inroads.

Last week, Benjamin T. Jealous, a prominent black leader and former N.A.A.C.P. president, endorsed Mr. Sanders and vowed to increase the senator’s support among black voters in South Carolina, a crucial primary state, as well as across the country. The lawyer for the family of Walter L. Scott, who was fatally shot by a police officer in South Carolina, withdrew his support from Mrs. Clinton and endorsed Mr. Sanders last month. Mr. Sanders also has several black surrogates, including the scholar Cornel West; Nina Turner, a former Ohio state senator; and Killer Mike, an Atlanta rapper.

Meanwhile, Mr. Sanders is expected to do some other interviews while in New York on Wednesday, including with ABC’s “The View” and CBS’s “Late Show With Stephen Colbert.”