The American Civil Liberties Union is calling on the federal government to stop cooperating with Gov. Greg Abbott’s executive order authorizing state troopers to transport migrants back to the border ports of entry – escalating a debate over the state’s authority to enforce immigration laws. The request by ACLU Texas and the group’s national leadership for the Biden administration to investigate the state’s latest immigration policy comes a week after the Texas Tribune reported on how state troopers are transferring suspected migrants to the port of entry in Eagle Pass and turning them over to federal immigration authorities.