Rep. Henry Cuellar (D-Texas) and his wife were recently indicted by the Department of Justice for allegedly taking hundreds of thousands of dollars in bribes over a period of several years. However, one columnist is arguing that Cuellar’s criminal charges are powerfully undermining a major Republican conspiracy theory. In his latest op-ed for MSNBC, columnist Steve Benen wrote that the DOJ’s prosecution of Cuellar — who is accused of accepting payments from a bank in Mexico City and an oil and gas company owned by the government of Azerbaijan — complicates the GOP’s claims of government being …