KEY POINTS
  • Sen. Kyrsten Sinema said in a tweet Friday that she was declaring her "independence from the broken partisan system in Washington and formally registering as an Arizona Independent."
  • Sinema and Sen. Joe Manchin of West Virginia have been wild cards for Democrats since the party gained narrow control of the Senate from Republicans in 2020.
  • Sen. Raphael Warnock's reelection win Tuesday in Georgia's runoff had boosted Democrats' hopes that a 51-49 majority in the Senate would give the pair less control on crucial bills.

Arizona Sen. Kyrsten Sinema has switched parties to become an independent, complicating the Democrats' narrow control of the U.S. Senate.

Sinema said in a tweet Friday that she was declaring her "independence from the broken partisan system in Washington and formally registering as an Arizona Independent."