A Texas National Guard who was deployed to prevent migrants entering the US has been arrested on suspicion of smuggling a migrant across the border in a government car. Specialist Savion Amari Donovan Johnson sparked a high speed chase with police in Brackettville, Texas, after he abruptly turned around at border checkpoint as a migrant jumped out. The 26-year-old’s sudden change of direction just ahead of a checkpoint on Highway 674 led to a 15-mile chase at speeds of more than 100mph. Sheriff Brad Coe said Johnson was a member of the Texas National Guard assigned to Operation Lone Star – a p…