WASHINGTON (AP) New Jersey Democratic Sen. Cory Booker held the Senate floor with a marathon speech that lasted all night and into Tuesday afternoon in a feat of endurance to show Democrats’ objections to President Donald Trump’s sweeping actions.

Booker took to the Senate floor on Monday evening, saying he would remain there as long as he was “physically able.” More than 20 hours later, the 55-year-old senator, a former football tight end, was plainly exhausted but still going. It was a remarkable show of stamina among the longest in Senate history as Democrats try to show their frustrated supporters that they are doing everything possible to contest Trump’s agenda.

“These are not normal times in our nation,” Booker said as he launched into his speech. “And they should not be treated as such in the United States Senate. The threats to the American people and American democracy are grave and urgent, and we all must do more to stand against them.”

Pacing, then at times leaning on his podium, Booker railed for hours against cuts to Social Security offices led by Trump adviser Elon Musk’s Department of Government Efficiency. He listed the impacts of Trump’s early orders and spoke to concerns that broader cuts to the social safety net could be coming, though Republican lawmakers say the program won’t be touched.

Booker also read what he said were letters from constituents, donning and doffing his reading glasses. One writer was alarmed by the Republican president’s talk of annexing Greenland and Canada and a “looming constitutional crisis.”

Throughout the day Tuesday, Booker got help from Democratic colleagues, who gave him a break from speaking to ask him a question and praise his performance. Booker yielded for questions but made sure to say he would not give up the floor. He stayed standing to comply with Senate rules.

“Your strength, your fortitude, your clarity has just been nothing short of amazing and all of America is paying attention to what you’re saying,” Senate Democratic Leader Chuck Schumer said as he asked Booker a question on the Senate floor. “All of America needs to know there’s so many problems, the disastrous actions of this administration.”

As Booker stood for hour after hour, he appeared to have nothing more than a couple glasses of water to sustain him. Yet his voice grew strong with emotion as his speech stretched into the afternoon, and House members from the Congressional Black Caucus stood on the edge of the Senate floor to support Booker.

“Moments like this require us to be more creative or more imaginative, or just more persistent and dogged and determined,” Booker said.

On Tuesday afternoon, tens of thousands of people were watching on Booker’s Senate YouTube page, as well as on other live streams.

Democratic aides, as well as Booker’s cousin and brother, watched from the chamber’s gallery. Sen. Chris Murphy accompanied Booker on the Senate floor throughout the day and night. Murphy was returning the comradeship that Booker had given to him in 2016 when the Connecticut Democrat held the floor for almost 15 hours to argue for gun control legislation.

The record for the longest individual speech belongs to Strom Thurmond of South Carolina, who filibustered for 24 hours and 18 minutes against the Civil Rights Act of 1957, according to the Senate’s records. As it rolled past 20 hours, Booker’s speech marked the fifth longest in Senate history.

Only one other sitting senator has spoken for longer. In 2013, Sen. Ted Cruz, a Texas Republican, held the floor for 21 hours and 19 minutes to contest the Affordable Care Act.

Booker repeatedly invoked the civil rights leader Rep. John Lewis of Georgia on Tuesday, arguing that overcoming opponents like Thurmond would require more than just talking.

“You think we got civil rights one day because Strom Thurmond after filibustering for 24 hours you think we got civil rights because he came to the floor one day and said, ‘I’ve seen the light,’” Booker said. “No, we got civil rights because people marched for it, sweat for it and John Lewis bled for it.”

Booker’s speech was not a filibuster, which is a speech meant to halt the advance of a specific piece of legislation. Instead, Booker’s performance was a broader critique of Trump’s agenda, meant to hold up the Senate’s business and draw attention to what Democrats are doing to contest the president. Without a majority in either congressional chamber, Democrats have been almost completely locked out of legislative power but are turning to procedural maneuvers to try to thwart Republicans.

Booker is serving his second term in the Senate. He was an unsuccessful presidential candidate in 2020, when he launched his campaign from the steps of his home in Newark. He dropped out after struggling to gain a foothold in a packed field, falling short of the threshold to meet in a January 2020 debate.

But as Democrats search for a next generation of leadership, frustrated with the old-timers at the top, Booker’s speech could cement his status as a leading figure in the party’s opposition to Trump.

Even before taking to the national political stage, Booker was considered a rising star in the Democratic Party in New Jersey, serving as mayor of Newark, the state’s largest city, from 2006 to 2013.

During college, he played tight end for Stanford University’s football team. He became a Rhodes scholar and graduated from Yale Law before starting his career as an attorney for nonprofits.

He was first elected to the U.S. Senate in 2013 during a special election held after the death of incumbent Democrat Frank Lautenberg. He won his first full term in 2014 and reelection in 2020.

As Democratic colleagues made their way to the Senate chamber to help Booker by asking him questions, he also made heartfelt tributes to his fellow senators, recalling their personal backgrounds and shared experiences in the Senate. Booker also called on Americans to respond not just with resistance to Trump’s actions but with kindness for those in their communities.

“I may be afraid my voice may shake but I’m going to speak up more,” Booker said.

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Catalini reported from Trenton, N.J.