FILE - Migrants who crossed the Rio Grande and entered the U.S. from Mexico are lined up for processing by U.S. Customs and Border Protection, Sept. 23, 2023, in Eagle Pass, Texas. Texas began flying migrants from the U.S.-Mexico border to Chicago on Wednesday, Dec. 20, a week after the city took a tougher stance on the buses that Republican Gov. Greg Abbott has been sending north since last year. (AP Photo/Eric Gay, File)