The younger Trump, though, also defended his father for "standing up for himself."
Missouri hasn't gone for a Democratic presidential candidate in 20 years.
"President Obama should have gone to Louisiana days ago, instead of golfing," Trump tweeted.
Both Clinton and Trump are deeply unpopular with Utah's likely voters.
Carlos Beruff is trying to knock off Rubio in next week's primary.
"I don’t think he understands what Article 5 is," Biden said.
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The Green Party nominee called climate change an "emergency expounded by racial disparities."
Jill Stein blasted Hillary Clinton for leaving progressives "out in the cold."
Democratic strategist James Carville says shutting down the Clinton Foundation would result in "somebody going to hell" and cost the lives of children across the globe.
Carville, who ran the presidential campaign for then-Gov. Bill...