Sanders said the flip-flopping shows “who Donald Trump is.”
"It is truly one of the greatest crimes ever," Trump said.
Johnson was at odds with his fellow candidates and was booed several times.
Sanders urged Clinton to choose a VP outside of the Wall Street circle.
Sanders rejected Donald Trump's frequent claim that the system of both parties is "rigged."
Bob Dole encouraged other Republicans to "get on the train."
McAfee said the party had to focus on making the biggest impact before November.
Marc Allan Feldman played a video of him rapping over a 50 Cent beat at the Libertarian convention.
Sanders has been campaigning hard in the state ahead of its June 7 primary.
Sanders wanted two convention committee chairs out for "personal hostility" toward him.