Now that U.S. Senate majority members have treated a (non) national emergency presidential declaration as a purely political exercise in 2020 primary insurance from party-line challengers and certain loss of big campaign money, things become clearer.
Allow me frame it thus: Republicans have decided to ignore their sworn oath of office to protect and defend the U.S. Constitution and its structure of three separate branches with defined responsibilities, all over fear of losing power and money individually and collectively. Essentially, political blackmail is denying the will of the people, a majority of whom do not want a border wall.
A majority of U.S. citizens also do not want the fundamentals of our Constitution upheld. Many have and still do sacrifice life and limb to defend the Constitution that many others tread upon and cynically disregard. Hopefully, there remain patriots in our judicial branch who will unhesitatingly defend our constitutional government from those who will not.