Richard Blumenthal made the remark at a Senate subcommittee hearing scrutinizing FIFA, after US authorities in May indicted 14 people -- including top football officials -- over tens of millions of dollars of alleged bribes for media rights contracts.
Swiss authorities are also investigating the hugely controversial award of the 2018 World Cup to Russia and the 2022 tournament to Qatar.
"The fact of the matter is that what has been revealed so far is a mafia-style crime syndicate in charge of this sport," Blumenthal told the subcommittee on Consumer Protection, Product Safety, Insurance, and Data Security yesterday.
Senators on the subcommittee oversee consumer protection, which includes sports.