Senator Roger Marshall proposed an amendment to the Cryptocurrency Market Structure Act, requiring large banks to allow at least two independent payment networks to process debit and credit card transactions, aiming to reduce merchants' card processing fees. This measure is similar to the Credit Card Competition Act and could lower costs for small merchants and potentially impact cryptocurrency debit card networks. However, due to concerns over fraud and implementation, it faced opposition from banks. After negotiations, the amendment was ultimately not included in the recent committee review.