Watch Live: Sen. Cory Booker delivering marathon speech on Senate floor to protest Trump policies

Democratic Sen. Cory Booker is delivering a marathon speech on the Senate floor, which started Monday evening and has continued into Tuesday, in a protest of the Trump administration's policies.

Booker, a 55-year-old who first came to the Senate in 2013 and is now the fourth-ranking Democrat, began speaking around 7 p.m. on Monday and said he would continue speaking "for as long as I am physically able." As the sun rose on Tuesday morning, and well into the day, he was still speaking from the Senate floor.

Booker cited the legacy of leaders, like late congressman and civil rights activist John Lewis, whom he said stood up "when this country was facing crossroads, was facing crises, they stood up."

"I rise today in an unusual manner," Booker said, before invoking Lewis' refrain to "get in good trouble, necessary trouble, help redeem the soul of America."

"Tonight, I rise with the intention of getting in some good trouble," Booker said, pledging to disrupt the normal business of the Senate. "I rise tonight because I believe sincerely that our country is in crisis… These are not normal times in America, and they should not be treated as such."