Mitch McConnell is scared a Kamala Harris presidency would spell disaster for the Republican party, prognosticating that a Democratic presidency would result in the demise of the filibuster and a liberal packing of the Supreme Court. “Let’s assume our worst nightmare – the Democrats went to the White House, the House, the Senate,” McConnell said during a speech to lawmakers in Louisville, Kentucky, Spectrum reports. “The first thing they’ll do is get rid of the [Senate] filibuster. Second, you’ll have two new states: D.C., Puerto Rico. That’s four new Democratic senators in perpetuity.” “If th…