Former CNN host Don Lemon is urging “black and brown people” to buy guns and arm themselves as the Trump administration cracks down on illegal immigration.During a recent podcast appearance, he advised “people who are here legally” to invoke their Second Amendment right.“Get a license to carry legally because when you have people knocking on your door and taking you away without due process as a citizen, isn’t that what the Second Amendment was written for?” Lemon said last week on writer Wajahat Ali’s “The Left Hook.”