This convention does not have official significance, though seniority generally is a factor in the selection of physical offices and in party caucuses' assignment of committees.[30] In the 116th Congress, the most-senior "junior senator" is Maria Cantwell of Washington, who was sworn in on January 3, 2001, and is currently 18th in seniority, behind Patty Murray who was sworn in on January 3, 1993, and is currently 6th in seniority. The most-junior "senior senator" is Kyrsten Sinema of Arizona, who was sworn in on January 3, 2019, and is 92nd in seniority, ahead of Mark Kelly who was sworn in on December 2, 2020, and is last in seniority as the most recent senator to be sworn in.[31]