WASHINGTON — President Trump on Monday said a caravan of migrants making their way toward the United States included “criminals and unknown Middle Easterners,” and blamed Democrats for the state of immigration law.

The “unknown Middle Easterners” Mr. Trump mentioned are a new cohort on the president’s recent list of “bad people” he says want to cross the border into America.

At a political rally on Friday, Mr. Trump said some people traveling in these groups headed toward the United States-Mexico border included “bad people,” “criminals,” “not little angels,” and “tough, tough people.” He did not mention Middle Easterners….