Group 1 - The Credit Card Competition Act aims to enhance competition among payment networks by allowing retailers to bypass dominant networks like Visa and Mastercard, which could disrupt their lucrative business model [2][3] - Shares of Visa and Mastercard fell by at least 4% following Trump's endorsement of the legislation, indicating market concern over potential impacts on their revenue [2] - The legislation has been supported by major retailers seeking to reduce high processing fees in the U.S., which are significantly higher than in other countries, although it faces opposition from congressional allies of the banks [3] Group 2 - Analysts view the passage of the legislation as unlikely but are monitoring for potential Republican support, suggesting that the initiative is politically motivated as part of Trump's focus on affordability ahead of the midterm elections [4] - JPMorgan Chase's CFO warned that capping credit card rates could significantly alter their business model and negatively impact U.S. customers, with potential consequences for access to credit for riskier borrowers [5]