If kept at the state level you could expect to see a Gov. deploy their troops at their state lines, the ACLU to file an emergency Commerce Clause appeal, and meanwhile the Prez will nationalize the troops. What a mess!
It is healthy to have the discussion but I am not comfortable giving blanket authority to the President. It's better to have a path available so a Governor can request Federal support, but it must come from the state and not be imposed by a President no matter how well intentioned.