Billionaire brothers Charles Koch and David Koch typically donate millions of dollars to GOP candidates they like, helping them try to defeat their Democratic counterparts. Let's take a look at some of the politicians they've helped in the past, as well as politicians who have been outspoken about their distaste for them.
David H. Koch is half of the Koch brother duo. He is pictured above with Julia Koch, attending The School of American Ballet 2015 Winter Ball at David H. Koch Theater at Lincoln Center on March 9, 2015 in New York City.
David Koch and Chairman of the Board and Chief Executive Officer of Transammonia Ronald P. Stanton attend the 2011 David Rockefeller Award Luncheon at The Museum of Modern Art on March 8, 2011 in New York City.
Sen. Chuck Schumer, D-New York, is in line to take Sen. Harry Reid's job in 2017 as Senate minority leader. He is not expected to embrace his colleague's passion for attacking the Koch brothers. Schumer is pictured speaking during the 2008 Democratic National Convention in Denver.
Senate Minority Leader Harry Reid, D-Nevada, speaks during a news conference on Capitol Hill after a policy meeting with Senate Democrats on April 28. Reid has been an outspoken critic of the Kochs' political moves.
Former GOP presidential nominee Mitt Romney is pictured greeting fellow Republicans at a dinner during the RNC Annual Winter Meeting aboard the USS Midway on January 16 in San Diego. During Romney's 2012 presidential campaign, the Koch brothers hosted a fundraiser where the tickets reportedly were $50,000 each.
Evan Jenkins received financial backing from the Koch brothers in his 2014 race for West Virginia's 3rd Congressional District. Democrats released ads slamming Jenkins for accepting the funds, but he still beat the longtime incumbent, Nick Rahall, by 10 percentage points.
Democrats point to Michigan Sen. Gary Peters' strategy with attacking the Koch brothers as an example of one that works. When he ran in the last election, his campaign criticized the Kochs' political spending and accused one of their companies of creating pollution in Michigan. He won the election. Peters is pictured alongside his wife, Colleen Ochoa, as he is sworn in by Vice President Joe Biden at the U.S. Capitol on January 6.