Imagine for a moment if Donald Trump made the decision to run for president as a Democrat instead of as a Republican. As Trump-mania continues to dominate the Republican presidential primary, it's not hard to envision an alternate reality - one where the real estate billionaire is taking the country by storm as a Democrat. In many ways, it would have been easier for Trump to enter the Democratic primary than the Republican primary. Trump was registered as a Democrat from 2001 to 2009 and donated hundreds of thousands of dollars to Democratic candidates like Nancy Pelosi and Harry Reid...