美国一州示威者与警察发生冲突：抗议特朗普打击非法移民，狙击手站楼顶

Core Points - Protests against Trump's crackdown on illegal immigration have intensified in Chicago, leading to clashes between demonstrators and police [1][2] - The "Midway Lightning Operation" initiated by Trump aims to target illegal immigrants throughout the city, facing resistance from local officials and protesters [2] Group 1 - On October 10, dozens of protesters gathered outside a facility in Illinois, chanting against Trump's immigration policies [1] - Following the clashes with police, at least four individuals were arrested [2] - The protests are part of a broader response to the "Midway Lightning Operation," which has sparked demonstrations across Chicago [2]