In the first hundred days of Donald Trump's presidency in the United States, he promoted several policies with high efficiency and a strong style, showcasing his 'America First' governing philosophy. In terms of the economy, he signed executive orders to boost American manufacturing, initiated tax reduction plans, and relaxed corporate regulations, attempting to stimulate domestic demand and employment. At the same time, he strengthened border security, promoted immigration restrictions, and pushed for the construction of a wall along the U.S.-Mexico border, sparking heated discussions both domestically and internationally. On the diplomatic front, Trump adopted a tough stance, reassessing trade agreements and foreign military deployments, thus altering America's traditional diplomatic strategy. While supporters believe his actions are decisive and reforms clear, critics argue that his policies are overly radical and have caused social divisions. The performance in the first hundred days was both controversial and marked the beginning of a completely new political style.