 For the first time in his life, Mr. Trump is praying, according to Carville, to win the White House and increase his chances of avoiding an orange jumpsuit. He needs Democrats to make the wrong moves in the coming days, namely to appear to rig the nomination for a fading president or the sitting vice president or some other heir apparent. He needs to be able to type all-cap posts about power brokers and big donors putting the fix in. He needs, in other words, for Democrats to blow it.