Hayden also pointed to other votes throughout Blunt’s career, including those helping to bail out Wall Street after the financial meltdown of 2008, and others lessening consumer protection, as proof of Blunt’s fealty to an industry that contributes heavily to his campaign.

“You don’t have to be Sherlock Holmes to see the connection,” Hayden said. “Goldman Sachs and its employees are the biggest donors to Blunt’s campaign because he has consistently voted for their interests.”

Republicans, including Blunt, opposed the recent Labor Department rule on financial advisers because they said it could cut off advice to lower-income investors. The financial bailouts of post 2008 were controversial between the political parties, and within political parties, with supporters arguing that without taxpayer bailouts of Wall Street, the U.S. economy would have suffered even more catastrophic damage and faced a longer recovery.

But those bailouts of big banks also spurred outrage among many Americans and were the basis of one of insurgent Democratic presidential candidate Bernie Sanders’ chief talking points about a “rigged” economy.