Republican presidential candidate former UN Ambassador Nikki Haley speaking at an election night event, Saturday, Feb. 24, in Charleston, S.C. Chris Carlson/AP hide caption
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Republican presidential candidate former U.N. Ambassador Nikki Haley speaks during the Family Leader's Thanksgiving Family Forum, Nov. 17 in Des Moines. On Tuesday, conservative mega-donors, the Koch network, signaled its endorsement of Haley as the super PAC they fund, Americans for Prosperity, backed the former S.C. governor. Charlie Neibergall/AP hide caption
David Koch underwrote both old-fashioned charitable causes, such as the David H. Koch Center for Cancer Care, and the conservative movement, reshaping U.S. politics. Diane Bondareff/Invision for Koch Industries/AP hide caption
David Koch Dies; Conservative Billionaire Helped Reshape U.S. Politics
Rep. Michelle Lujan Grisham, D-N.M., speaks at a news conference calling for the passage of the Dream Act in January, along with House Democratic leader Nancy Pelosi. Lujan Grisham is one of five Democratic lawmakers, along with nine Republicans, receiving praise over immigration, in the form of paid ads, by the Koch network. Aaron P. Bernstein/Getty Images hide caption
Breaking With Trump's GOP, Koch Brothers Praise Democrats On Immigration
Tea Party activists hold a rally on Capitol Hill in 2010. That grassroots movement, with backing from the Koch political network, helped Republicans win back the House in the 2010 midterms. In 2018, the Koch network is on defense against Democratic gains. Chip Somodevilla/Getty Images hide caption
Koch Brothers, Behind Tea Party Wave, Face Democrats' Rising Tide In 2018
A group numbering in the hundreds gather to protest the appearance of Senate Majority Leader Mitch McConnell R-Ky., and the policies of the Trump administration in Jeffersontown, Ky., on Wednesday. Timothy D. Easley/AP hide caption
Republican presidential candidate Donald Trump speaks at a rally on August 5 in Green Bay, Wisconsin. Darren Hauck/Getty Images hide caption
Indiana Gov. Mike Pence joins Republican presidential candidate Donald Trump at a rally in Westfield, Ind., on Tuesday. Michael Conroy/AP hide caption
David Koch speaks at the Defending the American Dream summit in 2015. He and his brother Charles lead a conservative political network that plans to spend hundreds of millions of dollars on the 2016 elections. Paul Vernon/AP hide caption
'Hidden History' Of Koch Brothers Traces Their Childhood And Political Rise
A volunteer with the Koch-funded Libre Initiative directs people in 2014 as groceries are distributed at a food bank it partially sponsors in San Antonio. Eric Gay/AP hide caption
Americans for Prosperity Foundation Chairman David Koch speaks in Orlando, Fla., in August 2013. Phelan M. Ebenhack/AP hide caption
Sen. Rand Paul, R-Ky., center, meets with members of the Londonderry Fish and Game Club in Litchfield, N.H., on Jan. 14. Paul was one of three GOP presidential hopefuls who attended Sunday's semiannual gathering of David and Charles Koch's donor network in California. Jim Cole/AP hide caption
Libertarian North Carolina Senate candidate Sean Haugh tweets his views on his support from American Future Fund. Twitter/Sean Haugh hide caption
Among outside groups — that is, not candidates or party committees — more than half of this cycle's political ads are financed by secret donors. iStockphoto hide caption
David Koch, executive vice president of Koch Industries, attends an event at The Economic Club of New York last year. Mark Lennihan/AP hide caption
Texas governor Rick Perry speaks on June 18, 2011 in New Orleans, Louisiana. Justin Sullivan/Getty Images hide caption