40%，特朗普支持率跌至第二任期新低，经济和移民政策引担忧

Group 1 - The core viewpoint of the article indicates that President Trump's approval rating has dropped to 40%, marking a new low during his second term, with concerns from the public regarding his handling of economic and immigration policies [1][6]. - The poll conducted over three days surveyed 1,023 adults across the U.S., with a margin of error of plus or minus 3 percentage points, revealing a significant polarization in public opinion towards Trump [4]. - Compared to a previous poll conducted in mid-July, Trump's approval rating for economic management increased from 35% to 38%, while his immigration approval rose from 41% to 43% [5]. Group 2 - Trump's administration has adopted aggressive strategies in both economic and immigration policies, which have led to mixed evaluations from the public [5][6]. - The article highlights Trump's trade policy, including the implementation of a 10% minimum baseline tariff and the potential for higher tariffs on imports if negotiations fail, which introduces significant uncertainty into the U.S. economy [5]. - Since January, Trump's overall approval rating has declined by approximately 12 percentage points, from 56% to 44%, reflecting widespread dissatisfaction with his second term [6].