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It would remove credit from 80% of Americans, and that is their back-up credit," Dimon, longtime chief of JPMorgan and Wall Street's most influential banker, said at the World Economic Forum in Davos.
Banking industry bodies have pushed back strongly against the move, arguing it would limit credit access for everyday consumers. Meanwhile, Wall Street analysts said such a measure would require legislation and has *slim odds of passage, with Democrats and Republicans divided over supporting it.
"I think we should test it," Dimon said. "The government can do it, they should force all the banks to do it in two states - Vermont and Massachusetts - and see what happens."
Though Dimon did not explain why he picked those two states, the idea drew laughs from the crowd. Left-leaning Senators Bernie Sanders and Elizabeth Warren, who represent Vermont and Massachusetts respectively, have both advocated for legislation that would cap credit card interest rates.
"People crying the most will not be the credit card companies. It will be the restaurants, retailers, *travel companies, the schools, the municipalities, because people will miss their water payments, this payment and that payment," Dimon said.