Carl Levin actually said...

"the highest rebate and best execution do not go together."

"Conflicts of interest damage investors and markets--first, by depriving investors of the certainty that brokers are placing the interests of their clients first and foremost."

"there is a conflict inherent in that pricing schema."

"Many, including this Senator, question whether the rise of high-speed trading is, overall, a good thing for markets and investors."