特朗普宣布：从三地撤军

Group 1 - The core viewpoint of the article is that President Trump announced the withdrawal of the National Guard from three Democrat-led cities: Chicago, Los Angeles, and Portland, claiming that their presence had significantly reduced crime rates in these areas [1] - Trump referred to cities like Chicago, Los Angeles, New York, Baltimore, and Oakland as "problem cities" and indicated that federal intervention was necessary to prevent their decline [1] - Legal actions have been initiated by multiple states and local governments to block the deployment of the National Guard, with the Supreme Court initially ruling against the Trump administration's plans to send the National Guard to Chicago [1]