jeffrey adam rosen (born april 2, 1958) is an american lawyer. rosen was the acting united states attorney general from december 23, 2020 to january 20, 2021. he was the 38th united states deputy attorney general from may 22, 2019 until he became acting attorney general. he was the 21st united states deputy secretary of transportation from may 18, 2017 to may 21, 2019. he was a senior partner at the law firm kirkland &amp; ellis.