After the Supreme Court’s 2010 Citizens United ruling unleashed the financial floodgates that allow individuals and corporations to make virtually unlimited contributions to political campaigns, Scott Walker rode into the Wisconsin governor’s office on a deluge of bloated donations and immediately set out to repay his chief benefactors, billionaires Charles and David Koch. Pursuing a combative legislative agenda drawn straight from the Koch brothers’ playbook, his most controversial move was designed not to shore up the state budget, as he claimed, but to amplify the volume of corporate speech by silencing the voice of public-sector unions. Citizen Koch surveys the resultant chorus of protests by focusing on opposition voices from two very different political perspectives: the union members who converge on Wisconsin’s state capital to stall Walker’s unapologetic power grab and Republican presidential candidate Buddy Roehmer of Louisiana, who refuses to accept any corporate donations and, as a result, finds himself denied a spot in his own party’s presidential debates.  TW