In this Nov. 21, 2016 photo, former Labor Secretary Elaine Chao arrives at Trump Tower in New York, to meet with President-elect Donald Trump. President-elect Trump has picked Elaine Chao as Transportation secretary. (AP Photo/Carolyn Kaster) 

This June 18, 2015, file photo, provided by the Charleston County Sheriff's Office shows Dylann Roof. A judge ruled Friday, Nov. 25, 2016, that Roof is competent to stand trial for the killing of nine black worshippers at a South Carolina church. (Charleston County Sheriff's Office via AP, File) 

Student Nicholas Flores reacts as police respond to an attack on campus at Ohio State University on Monday, Nov. 28, 2016, in Columbus, Ohio. Multiple people were injured in the attack and a suspect was shot, school and hospital officials said. (Adam Cairns/The Columbus Dispatch via AP) 

Donald Trump speaks in Hershey, Pa., Nov. 4, 2016. President-elect Trump holds stock in the company building the disputed Dakota Access oil pipeline, and pipeline opponents warn that Trump’s investments could undercut any decision he makes on the $3.8 billion project as president. (AP Photo/ Evan Vucci, File) 

Monday, Nov. 21, 2016, file photo, protesters against the Dakota Access oil pipeline stand on a burned-out truck near Cannon Ball, N.D., that they removed from a long-closed bridge a day earlier on a state highway near their camp in southern North Dakota. President-elect Donald Trump holds stock in the company building the disputed Dakota Access oil pipeline, and pipeline opponents warn that Trump’s investments could undercut any decision he makes on the $3.8 billion project as president. (AP Photo/James MacPherson, File) 

Recruiters talk to those looking at employment opportunities at a job fair in Pittsburgh, March 30, 2016. States that voted for Hillary Clinton in last week’s presidential election reported stronger job growth in the previous year than states that supported Donald Trump, according to data released by the Labor Department Friday, Nov. 18. (AP Photo/Keith Srakocic) 

Construction continues on the presidential reviewing stand on Pennsylvania Avenue in front of the White House in Washington, Saturday, Nov. 26, 2016. The reviewing stand is where then President Donald Trump will view the inaugural parade on Jan. 20, 2017. (AP Photo/Alex Brandon) 

Kathleen "KT" McFarland is seen at her home in New York, March 6, 2006. President-elect Donald Trump has tapped Fox News analyst McFarland to serve as deputy national security adviser. (AP Photo/Jason DeCrow, File) 

Cuba's leader Fidel Castro exhales cigar smoke during an interview at the presidential palace in Havana, Cuba March 1985. Castro has died at age 90. President Raul Castro said on state television that his older brother died late Friday, Nov. 25, 2016. (AP Photo/Charles Tasnadi, File) 

Airport worker Raquel Brito, left, speaks at a news conference at O'Hare International Airport Monday, Nov. 21, 2016, in Chicago. Organizers of a Nov. 29 nationwide day of protests by hourly workers say a planned strike at O'Hare International Airport in Chicago, is only a part of their push for a $15 hourly wage and union rights. The Service Employees International Union Local 1 said Monday that hundreds of workers will strike that day at O'Hare, one of the nation's busiest airports. (Mitch Dudek/Chicago Sun-Times via AP)