I agree he is, but on the other hand those furloughed employees will receive back pay so an even more prolonged shutdown is essentially a paid vacation for the ones who have some savings.
So I’m sure /those/ employees might encourage a shutdown, but it isn’t because they believe in his cause
With the widely reported stats that most Americans can’t handle a $400 emergency, you can’t have too much of a “vacation” when you are worried about your bills.