I understand why they want to do this, but fact is, he was elected and will be President.  As a practical matter, these people have to work with the President, and with a guy this vindictive and petty, he will relish penalizing them more than he would accepting some type of legislation that may well be good for the country.  So, from that standpoint, it is silly.  Philosophically, THEY are our elected representatives, and Trump is the elected leader...they need to "play nice" however much they loathe ( as I do ) Mr. Trump.