The Justice Department is accusing Visa of running a debit card monopoly that has hiked fees for American consumers and businesses.

The Department of Justice (DOJ) filed an antitrust lawsuit against Visa. The lawsuit alleges that the financial firm holds a monopoly over debit network markets allowing it to charge banks and markets with exorbitant fees that get passed onto consumers and keep rival companies like PayPal and Square from competing on their level.

Durbin and Marshall further used the announcement of the suit as an opportunity to urge passage of their Credit Card Competition Act, arguing that the CCCA is one way to bring competition to the credit card market and end the “price-gouging tactics” of the “Visa-Mastercard duopoly” that harms consumers and small businesses.