Nope. Not gonna happen.

Not really. I won't say they wouldn't get away w/ it on a liberal supreme court b/c they would but the current one is not going to allow further infringements that are so drastic atm. In the future probably.

I'm surprised the last guy didn't try it, but what do I know?
The kicker would be what they attempt to do once they declare the emergency. What specific acts they take afterwards...

I have a feeling that would be political suicide for anyone involved.