政治生涯充满戏剧性，任命之际赶上大裁员，美交通部长成NASA临时局长

Core Points - President Trump announced that current Transportation Secretary Sean Duffy will temporarily serve as NASA Administrator, a position that has been vacant since the withdrawal of Jared Isaacman’s nomination [1][4] - Duffy expressed honor in accepting the role and emphasized the importance of space exploration [3] - Duffy has a diverse background, including a political career focused on transportation and a stint as a television commentator [3] NASA Leadership and Controversies - Duffy's appointment has sparked controversy, particularly following the withdrawal of Isaacman’s nomination, which was attributed to concerns over his ties to Elon Musk and SpaceX [4] - Tensions between Duffy and Musk were reported, highlighting a past confrontation regarding government efficiency and air traffic control staffing [4] NASA Workforce Changes - The U.S. government is reportedly pushing to lay off over 2,100 senior employees at NASA, primarily affecting core technical areas such as scientific research and human spaceflight [4][5] - Despite the layoffs, NASA aims to maintain its leadership in space exploration and continue pursuing key objectives like lunar missions and Mars landings [5] - Concerns have been raised about the potential loss of expertise and management capabilities due to the layoffs, with warnings that the agency's future goals may be jeopardized [5] Budget Implications - The proposed budget for fiscal year 2026 indicates a 25% reduction in NASA's funding and plans to cut over 5,000 employees, which could lead to the smallest operational scale for NASA since the 1960s [5]