He does not need to declare a national emergency, and shouldn’t, though it would create a huge kerfuffle and Trump likes a good kerfuffle.
he needs to do it or kiss 2020 goodbye
IMHO, money for wall is less important than the authorization. If the word “wall” is anywhere in the agreement... it’s good to go, $$$ will be found. DemWits are showing themselves as hypocrites yet again... and don’t have a clue when they have been out maneuvered! Media “Lewinskys” are like enablers and have left the DemWits unprepared for a real fight... IMHO.