A US immigration officer shoving a woman in a New York City courthouse to the floor. Protesters dispersed with tear gas outside a Chicago detention centre. A woman injured during an arrest in the Boston area. The incidents on Thursday and Friday highlight the growing tensions in major US cities over President Donald Trump's aggressive immigration crackdown days after a shooting targeting an Immigration and Customs Enforcement facility in Dallas left one detainee dead and two others seriously wounded. Trump, a Republican, aims to deport record numbers of immigrants living in the US illegally, framing the push around criminals but arresting many without criminal records. Residents in New York, Chicago, Washington, and other Democrat-leaning metro areas have pushed back in...