Mark Green resigned from Congress because he accepted an opportunity in the private sector that he found too exciting to pass up. He announced his resignation after voting for President Donald Trump's "big, beautiful bill," a significant piece of legislation. Green, who served as chair of the House Homeland Security Committee, stated that his time in Congress had come to an end and expressed pride in his work, especially regarding border security measures and conservative values. His resignation took effect after the House voted again on the reconciliation package he was involved with overseeing. This departure temporarily reduced the Republican majority in the House, leading to a special election to fill his seat.