A fed­er­al judge in Los Angeles has ad­ded an­oth­er leg­al chal­lenge to Pres­id­ent Trump’s con­tro­ver­sial sus­pen­sion of travel from a group of pre­dom­in­antly Muslim coun­tries, is­su­ing an emer­gency or­der that for­bids gov­ern­ment of­fi­cials from en­for­cing many of the new rules.