The House of Representatives Historian’s Office said Wednesday that House Minority Leader Nancy Pelosi, D-Calif., on Wednesday spoke for a longer time on the House floor than anyone has in at least 100 years, and may have set a record.

“It appears that Leader Pelosi today set the record for the longest-continuous speech in the House, going back at least to 1909 when Champ Clark of Missouri held the floor for five hours and 15 minutes,” the announcement from the historian’s office reads. Clark’s speech was the only speech of a comparable length that the historian’s office could find.

A statement that Washington Post reporter Ed O’Keefe tweeted out noted that although Clark held the floor for over five hours, he was repeatedly interrupted during his remarks against the tariff overhaul that occurred that year.

Pelosi has not yet been interrupted during her speech on immigration, which she began at 10:04 a.m. She ended her eight-hour-plus speech shortly after 6 p.m.

The longest speech in the Senate goes to former Sen. Strom Thurmond, a Democrat at the time, who held the floor for 24 hours and 18 minutes in 1957 to speak against the Civil Rights Act of 1957.

Editor's note: The story has been updated to correct former Sen. Strom Thurmond's party affiliation at the time of his 24-hour Senate speech. He was a Democrat at the time, not a Republican.