Senate Democratic leader Charles Schumer is getting hit with friendly fire over the lack of diversity in Senate staffers from a veteran black New York party activist with ties to Gov. Cuomo and Al Sharpton.

Charlie King, former executive director of the New York State Democratic Party, plans to stand outside Schumer’s D.C. office to protest the under-representation of minorities employed in top staff positions by Senate Democrats.

King said he’s holding the one-man vigil in honor of civil rights leader Dr. Martin Luther King.

“How can we as Democrats complain about Jeff Sessions being appointed attorney general when our party doesn’t hire minorities? It exposes us as hypocrites,” King told The Post.

“We have to get our own house in order.”

King’s campaign is sure to raise eyebrows.

He served as executive director of Al Sharpton’s National Action Network and was Andrew Cuomo’s running mate for lieutenant governor in 2002, and still has the governor’s ear.

King said neither Sharpton nor Cuomo has anything to do with his protest.

In response, Schumer said he is expanding the Senate’s diversity initiative, which includes implementing the National Football League’s Rooney rule that requires that minorities be interviewed for top positions.

He’s also hiring a director of engagement, Cietta Kiandoli, to boost diversity hiring and will work with New Jersey Cory Booker and Hawaii Sen. Brian Schatz to help bolster minority hires.

“Senator Schumer believes that the more diverse the U.S. Senate is, the better it can serve the American people. The Senator is working to make the Rooney rule standard practice across-the-board in the Senate and is dedicated to several other diversity measures he believes will be good for the Senate and the country,” said Schumer spokesman Angelo Roefaro