Sen. Joe Manchin (D-W. Va.) tested positive for COVID-19 on Monday morning.

“This morning I tested positive for COVID-19. I am fully vaccinated and boosted and am experiencing mild symptoms,” Manchin tweeted.

“I will isolate and follow CDC guidelines as I continue to work remotely to serve West Virginians.”

Although the Senate is about to head off for August recess in two weeks, Manchin’s absence could sideline items that Democrats want to push before then, according to NBC News. Manchin is considered a centrist in the Senate, which means that his vote does sometimes have the power to make or break bills.

This morning I tested positive for COVID-19. I am fully vaccinated and boosted and am experiencing mild symptoms. I will isolate and follow CDC guidelines as I continue to work remotely to serve West Virginians.

— Senator Joe Manchin (@Sen_JoeManchin) July 25, 2022

Fox News reporter Chad Pergram noted that 14 members of Congress have tested positive for the virus in the past 16 days.

With positive test by Manchin, that means 173 mbrs of 117th Congress have tested positive. 123 mbrs this year. 14 mbrs in past 16 days

— Chad Pergram (@ChadPergram) July 25, 2022

The Senate has a 50-50 split, but it is under a Democratic majority due to tie-breaker Vice President Kamala Harris.

President Joe Biden is also battling a minor case of COVID-19 as well, and he is continuing his duties as president while in isolation, RedState reported.