Protesters decrying President Trump’s Supreme Court nomination blocked traffic outside Trump Tower on Monday night, leading to the arrests of seven people, law enforcement sources said.

Among those picked up was City Councilman Jumaane Williams (D-Brooklyn), who is running for lieutenant governor.

Williams tweeted pictures of himself being led away in handcuffs by cops, shortly after Trump named Brett Kavanaugh as his nominee to the high court.

“Please continue the fight that has brought us here!” he told his fellow protesters, under a hand-painted sign that read “Reclaim SCOTUS.”

Meanwhile, US Sens. Kirsten Gillibrand (D-NY), Cory Booker (D-NJ) and Bernie Sanders (I-Vt.) led protests against Kavanaugh’s nomination on the steps of the Supreme Court in Washington.

“Are you ready for a fight? Are you ready to defend Roe v. Wade?” Sanders said.

“This is a tough fight but it is a fight that we can win . . . We have the American people on our side, now we have to go state by state by state to make sure senators do what their constituents want.”

Additional reporting by David K. Li