Then-House Speaker Newt Gingrich holds the Congressional Compliance Bill, which was the first bill passed by the 104th Congress after the "Republican Revolution" of 1994. Then-Senate Majority Leader Bob Dole of Kansas is at right.
Oklahoma Attorney General Scott Pruitt, shown in 2013, is President-elect Donald Trump's pick to head the EPA. Pruitt's outspoken criticism of climate change and his close ties to the energy industry have raised concerns about his ability to lead the agency.
Robert Odeki (center) marches with SEIU Local 105 as the union protested for a minimum wage of $15 an hour outside the Colorado State Capitol in September.
Joe Amon /Denver Post via Getty Images
President Barack Obama speaks during a campaign rally for Democratic presidential nominee Hillary Clinton at Cheyenne High School on Oct. 23 in North Las Vegas, Nev.
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Conservative donor David Koch in a 2013 file photo. The political network he and his brother, Charles, have created is not backing Donald Trump's presidential bid this year.
Phelan M. Ebenhack/AP