Donald Trump has been at the center of dozens of controversies over the last few months.
Marco Rubio has spent most of the campaign taking the high road, ignoring Donald Trump and working on hammering home his own message of optimistic, can-do success.
Where we are at now:
Hillary Clinton United States Secretary of State (2009–2013) from New York
Bernie Sanders U.S. Senator from Vermont (2007–present)
Ben Carson Director of Pediatric Neurosurgery of Johns Hopkins Hospital (1984–2013)