Matt Whitaker is the acting U.S. attorney general. On November 7, 2018, Attorney General Jeff Sessions submitted his letter of resignation at Trump's request. Trump then announced on Twitter that Whitaker, who served as Sessions' chief of staff, would serve as acting attorney general until a new one is nominated and confirmed.
Trump tweeted, "We are pleased to announce that Matthew G. Whitaker, Chief of Staff to Attorney General Jeff Sessions at the Department of Justice, will become our new Acting Attorney General of the United States. He will serve our Country well. We thank Attorney General Jeff Sessions for his service, and wish him well! A permanent replacement will be nominated at a later date."
Read more about his appointment as acting Attorney General here.
Whitaker was a Republican candidate for the United States Senate in the 2014 elections in Iowa. He formally announced his candidacy on June 3, 2013. He was defeated by Joni Ernst in the Republican primary on June 3, 2014.
Whitaker was a U.S. Attorney for the Southern District of Iowa from 2004 to 2009.