Kaine also criticized Trump for his past comments about John McCain.
The conservative Iowa lawmaker's tweet came just hours before the first debate.
A raft of new polling data shows the race is a toss-up.
The 30-second spot plays of the #TrumpTrain hashtag.
Both Trump and Clinton are viewed unfavorably by a majority of voters.
Rep. Maxine Waters called Donald Trump a "trickster."
Bloomberg will be the only TV network to display on-screen fact-checks during the debate.
Nostalgia alert: For one day only, MTV’s “TRL” is coming back, sort of.
The now-defunct music video countdown show — short for “Total Request Live” and hosted by Carson Daly — will return to the cable network on Tuesday for National...
MSNBC recommended that Trump stop lying and Clinton sell her presidency.
One of the site's three models says Clinton would win if election were held today.