In legal papers filed Friday, Brett Johnson, who is leading the legal team, acknowledged that vacancies in the U.S. Senate must be filled by a special election. But Johnson told U.S. District Court Judge Diane Humetewa that the U.S. Constitution allows the Legislature to let Ducey name a senator to serve until the next regular election.

Martha McSally scored the political redo of a lifetime when she was appointed to the U.S. Senate on December 18.

Sen.-elect Kyrsten Sinema will be sworn into office before Martha McSally, who Gov. Doug Ducey appointed Tuesday to fill Arizona’s U.S. Senate vacancy.

Gov. Doug Ducey has appointed Martha McSally to fill the U.S. Senate seat that Sen. Jon Kyl will vacate at the end of the year.

Kyl, who never planned to serve beyond this congressional term, will step down from the appointed position, leaving Gov. Doug Ducey to appoint someone new to serve until 2020.

“I want you to know I’m going to serve the four years of my governorship,” Ducey, who was just re-elected, said in a Monday interview on KTAR.

Attorney General Mark Brnovich warned Monday that people "need to be really careful when making serious allegations'' about election fraud or other issues or risk undermining democracy.

The former leader of Arizona’s Libertarian Party filed a lawsuit against Gov. Doug Ducey Wednesday, arguing he must immediately hold a special election to fill the U.S. Senate seat formerly held by John McCain.

Supreme Court Justice Clint Bolick urged Gov. Doug Ducey to name Maricopa County Attorney Bill Montgomery to the U.S. Senate just days after John McCain died.

Adams, who served through Ducey’s first term, announced on Twitter that he will return to the private sector, although he did not specify his plans.