Senate Majority Leader Mitch McConnell (R-Ky.) has privately cautioned President Donald Trump not to declare a national emergency to build his southern border wall, The Washington Post reported Friday. He warned Trump that such a declaration might split the GOP and that Congress could pass a resolution opposing it, two Republican sources familiar with the conversation told the newspaper. In such a situation Trump might be forced into the first veto of his presidency — against his own party, McConnell pointed out, according to the sources...Some GOP legislators have already spoken out against an emergency declaration — and against another...