An ensuing battle between Texas and the federal government has reached another stage with the onset of the state’s Senate Bill 4. Under SB4, Texas authorities at the state and local levels would be allowed to stop, detain and arrest migrants or those who are suspected of crossing U.S. borders illegally. Under normal circumstances, these would all be the duties of federal law enforcement and courts. However, due to record numbers of immigrants crossing the southern border illegally and what the Texas...