If Hillary Clinton wants to be president - and for nearly a decade that hasn’t been in doubt - she’s got to change her act in a very major way.It must be beyond sobering to the Clinton forces that Donald Trump has gone from can’t-be-nominated to could-be-elected within weeks. He trails Clinton by just 3 percentage points in the latest Wall Street Journal-NBC News poll. And it’s not even June.The most radical thing Clinton should do to get her campaign back on track is compel her husband to step back - way back.