What if precedent gets set this year that allows the next time we have a D president they declare the wide circulation of firearms in the civilian population of the U.S. a "National Emergency" based upon ~10K homicide deaths annually?
It might be valuable to consider and conjecture a few steps ahead....
Firearms are constitutionally protected ( somewhat ) a wall isn't. If guns laws could have been done with the stroke of a pen the last administration would have done that.