Bernie Sanders supporters have a right to be angry. The leaked emails from the Democratic National Committee apparently confirmed what they have said all along — that the political system was rigged against their candidate in favor of Hillary Clinton. The Democrats created a mess. And they are turning to Sanders — the very one they betrayed — to come in and clean it up. Long before the primaries ended, Clinton had tried to open the door to Sanders' supporters. Recently, Sanders even reached out and gave them his OK to switch sides. But just as some were about to take their first cautious step, the DNC walked up and slammed the door shut.