政治极化现象愈演愈烈，美国联邦政府时隔近七年再“关门”

Group 1 - The U.S. federal government has entered a shutdown due to a failure to reach an agreement on a temporary funding bill, affecting hundreds of thousands of federal employees and public services [1][2] - The shutdown is expected to impact the release of key economic data, including non-farm payroll figures, which will not be published during this period, leading to increased market uncertainty [1][3] - The political polarization in the U.S. has intensified, with the Trump administration suggesting potential permanent layoffs of federal employees, which could exacerbate economic impacts and raise concerns about governance [2][3] Group 2 - Historical context shows that government shutdowns have occurred over twenty times since the 1970s, with significant economic losses, such as the previous shutdown costing over $10 billion [3] - The U.S. faces a growing debt issue, with budget deficits exceeding 6% of GDP in recent years, raising concerns about a potential fiscal cliff as the government approaches unsustainable debt levels [3]