I am no democrat,and certainly not a snowflake liberal. However nor am I a Republican. I am a conservative with no political affiliation. So I have some freedom of objectivity.
An emergency in my view is something that is both unexpected an urgent.
This situation does not fill either of those requirements. The invasion from the South has been going on for years, so it is hardly unexpected. Further, why now, after all these years, is it suddenly urgent? What makes each day now so much more crucial than the previous?
Sorry Republicans, Trump is playing pure politics here, and there will be a day of reconciliation for this.
An emergency could be something unexpected and urgent, but it could also be defined as circumstances demanding immediate action. The tens of thousands of migrants in caravans approaching our unwalled (in many places wide open) border do constitute a circumstance that demands immediate action.
Frankly, the caravans could also be defined as unexpected and urgent, too. Before they recently arose, did anybody really expect them ? I didn't hear anybody talking about caravans of tens of thousands of people, until it all started happening.
It most certainly is urgent, because if something isn't done quick, then very soon we will have tens of thousands of people illegally storming across our border, bringing all the harms to Americans that they do.