Senator Graham has good intentions, but, I think there should be great caution in turning the USA Homeland into a battlefield. I think it is a mistake to admit some Who-Ha made his way into the USA and was successful in killing Americans on a battlefield. 

New York didn't see their soil as a battlefield. The people of New York stated they needed to address their infrastructure to prevent the use of trucks, even large trucks, from causing injuries and death within their city. 

I think the New York Governor and New York City's Mayor should have a great deal of input in determining if the city is a battlefield.

I remind it is highly unconstitutional for any military movement within the borders of the USA. To consider an immigrant an enemy combatant is a huge mistake. I don't want any part of my country to be considered a battlefield. That elevates the terrorist and provides a platform they should never enjoy. Such a status of a terrorist striking within the USA would give more poison to the charismatic movement within Daesh.

Senator Graham was an honorable member of the US Air Force in the capacity of a lawyer. He tends to reach into his experience in the USA military to find solutions. The US Constitution is specific about the power of the military within the borders of this country. It is imprudent to place an overlay of a battlefield to the peaceful lives of Americans.