IT HAS BEEN hard to keep track of the blitz of new immigration policies that President Donald Trump has introduced since taking office in January. During the first 100 days of his second presidency he has tried to end birthright citizenship; used war powers to deport alleged gang members to El Salvador; revoked the visas of more than 1,700 international students and recent graduates; and classified some 6,000 migrants as dead in order to cancel their Social Security cards and encourage them to self-deport. That is just a short list.