Sen. Elizabeth Warren's (D-MA) speech was cut off late Tuesday night as she read a letter from Coretta Scott King condemning Sen. Jeff Session (R-AL).
Senate Republicans invoked Rule 19, which forbids demeaning another senator's character.
While that rule is rarely used, it's not the only time a politician has been silenced. Here are four other times it's happened.
Silenced for saying 'vagina'
In the Michigan House of Representatives, Lisa Brown was challenging strict abortion legislation and said, "I'm flattered you're all so interested in my vagina, but no means no."
I don't even want to say it in front of women. I would not say that in mixed company.
Brown was barred from speaking on the Michigan House floor the next day for violating decorum. Fellow state Rep. Mike Callton said her comments were "so offensive" that they didn't belong on the floor.
Live streams shut down
WATCH | Congressional Democrats staged a sit-in last summer to fight for a gun control bill after the Orlando nightclub shootings. While nobody was technically silenced, C-SPAN cameras that live-streamed the proceedings were shut off.
The fight that started it all
The Senate's Rule 19 has a bit of a violent history. It started with a feud between two Democratic senators from South Carolina: Benjamin Tillman and John McLaurin.
According to a Senate history of the incident, Tillman used a speech on the Senate floor to criticize McLaurin for letting Republicans influence him on the treaty to annex the Philippines. He accused McLaurin of treachery. McLaurin ran into the chamber and called Tillman's comments a "willful, malicious and deliberate lie."
A fistfight broke out between the Senators. When the dust settled, both senators were censured, and a new rule was passed later that year to ban speech that condemned a senator's character.
The one time Rule 19 was actually used
Rule 19 was only invoked once before the Warren incident in recorded Senate history. Then-Senator John Heinz. (R-PA) invoked it after Lowell Wicker (R-CT) called him an "idiot" and "devious."
Heinz then stormed to the front of the room with a rule book and pointed to Rule 19. Majority Leader Robert Byrd (D-WV) calmed both men down and told them to shake hands.
Here's a Senate record of that incident.
WATCH | For more news you need, check out our 60 Second Circa.