Sen. Cory Booker (D-NJ) launched a marathon speech on the floor of the Senate Monday evening to criticize President Donald Trump, Tesla CEO Elon Musk, and the current state of affairs under the Trump administration.

Booker vowed to hold control of the floor, halting all other legislative business, for as long as he was “physically able” to do so. He began around 7 p.m. Monday. More than 16 hours later, Booker was still speaking as of 11:30 a.m. Tuesday, taking only brief breaks to allow Democratic colleagues to speak in his place.