Tom Cotton on Tuesday called the Clinton Foundation "one of the largest money laundering operations in the world."
The junior senator from Arkansas made the comments on conservative radio host Hugh Hewitt's program.
"This is why if Hillary Clinton wins this election and they don't shut down the Clinton Foundation and come clean with all of its past activities, then there's no telling the kind of corruption that you might see out of the Clinton White House," Cotton said. "They did it in the State Department. Of course, they're going to do it in the White House."
Cotton defended the optics of the timing of FBI Director James Comey's announcement last week that he's reopening the investigation into Clinton's emails.
"Hillary Clinton only has one person to blame for all of this," Cotton said. "She is the one that set up that private server. She is the one that used it for classified information. She's the one that violated U.S. government security in handling materials. She’s the one that always thinks she can get away with it. This is not an FBI or a Director Comey problem. This is a Hillary Clinton problem, and this is why so many Americans view her as untrustworthy and dishonest."