Arizona Democrat Mark Kelly sworn into the Senate

Kathryn Krawczyk

Arizona, we have a senator.

Mark Kelly landed in the Capitol on Wednesday, arriving for his swearing in ceremony with his wife, former Rep. Gabrielle Giffords. Kelly was then sworn in to replace Sen. Martha McSally (R-Ariz.), narrowing the Senate's Republican majority to 52 seats and joining Sen. Kyrsten Sinema (D) to give Arizona its first two Democratic senators since the 1950s.

Kelly, a former astronaut, handily beat McSally in last month's special election to fill the late Sen. John McCain's seat. He'll have to defend the spot again in two years.

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