Democrat Cory Booker set a record on Tuesday for the longest speech in Senate history after speaking for more than 24 hours. 

Booker took to the Senate floor Monday evening, saying he would remain there as long as he was “physically able.” More than 24 hours later, the 55-year-old senator was still going.

It was a remarkable show of stamina as Democrats try to show their frustrated supporters that they are doing everything possible to contest Trump’s agenda.

Booker was still talking after 24 hours and 20 minutes on the Senate floor, breaking the record set in 1957 by right-wing Republican Strom Thurmond in a speech opposing the Civil Rights Act.