The setbacks might be said to be mounting. The losses generally endured by the Republican Party in the November elections are still smarting; the Trump administration’s approval ratings are still slipping; and court judges — even some of whom were appointed by the president — are continuing to issue little slaps on the wrist here and there. In the most recent climbdown, Donald Trump pulled members of the National Guard from Los Angeles, Chicago and Portland, Oregon. Last week, just before Christmas, a court ruled that the president could not deploy troops in the Chicago area where local officials had…