Mark Kelly to be sworn in as senator on Wednesday

Sen.-elect Mark KellyMark KellyJuan Williams: GOP infighting is a gift for Democrats Koch Industries buys solar power company from GOP Senate candidate Conservative group targeting Kelly, Hassan, Cortez Masto in multi-million-dollar ad blitz MORE (D-Ariz.) will be sworn in on Wednesday, according to a senior Democratic aide.

Kelly defeated GOP Sen. Martha McSallyMartha Elizabeth McSallyBusiness groups, sensing victory, keep up pressure over tax hikes Kelly raises million in third quarter Ruben Gallego is left's favorite to take on Sinema MORE (Ariz.) earlier this month and the results of the race are expected to be certified on Monday, clearing the way for him to join the Senate.

The swearing-in of Kelly, who is married to former Rep. Gabby Giffords (D-Ariz.), will narrow the Senate GOP majority from 53-47 to 52 Republican seats to the Democrats' 48.

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In addition to McSally, Democrats defeated GOP Sen. Cory GardnerCory GardnerThe Hill's Morning Report - Presented by Facebook - Biden to tackle omicron risks with new travel rules Gun control group alleges campaign finance violations in lawsuit against NRA Colorado Supreme Court signs off on new congressional map MORE (Colo.), while Republicans unseated Democratic Sen. Doug Jones (Ala.). Which party will control the chamber in January remains in limbo and will be decided by the outcome of the two January runoff elections in Georgia.

But Kelly's ascension to the Senate does complicate a GOP effort to confirm Judy Shelton, President TrumpDonald TrumpSenate rejects attempt to block Biden's Saudi arms sale Crenshaw slams House Freedom Caucus members as 'grifters,' 'performance artists' Senate confirms Biden's nominee to lead Customs and Border Protection MORE's controversial Federal Reserve Board nominee.

An attempt to confirm Shelton before the Thanksgiving recess ran into a roadblock because of GOP opposition and coronavirus-related absences.

Because three Republican senators — Lamar AlexanderLamar AlexanderMcConnell gets GOP wake-up call The Hill's Morning Report - Presented by Alibaba - Democrats return to disappointment on immigration Authorities link ex-Tennessee governor to killing of Jimmy Hoffa associate MORE (Tenn.), Susan CollinsSusan Margaret CollinsSenate confirms Biden's nominee to lead Customs and Border Protection Hillicon Valley — Presented by Connected Commerce Council — Incident reporting language left out of package Language requiring companies to report cyberattacks left out of defense bill MORE (Maine) and Mitt RomneyWillard (Mitt) Mitt RomneyRomney praises Biden's boycott of Beijing Olympics White House announces diplomatic boycott of Beijing Olympics US expected to announce diplomatic boycott of Beijing Olympics soon: report MORE (Utah) — oppose Shelton, once Kelly is sworn in she will not have the votes to be confirmed unless McConnell can get one of the senators to change their votes or take advantage of a Democratic absence.