U.S. Senator Lisa Murkowski (R-AK) Monday afternoon announced her positive COVID diagnosis. She is the fourth member of the Senate in recent days to test positive for COVID-19.

Hours earlier Senator Joe Manchin (D-WV) also announced he had tested positive for COVID. On Thursday Sen. Tom Carper (D-DE) announced he had tested positive and was isolating for five days.

That same day Sen. Tina Smith (D-MN) announced her positive test, but she returned to work Monday. The current absence of three (likely) pro-same-sex marriage voting Senators due to COVID may throw a wrench into Majority Leader Chuck Schumer’s plans to put to a vote legislation to protect same-sex marriages.