Tim Kaine: Donald Trump Is a 'Threat' to Progressives

Democratic vice presidential nominee Tim Kaine said Donald Trump is "a threat to everything" Bernie Sanders and his supporters stand for.

"They understand who Hillary [Clinton] is and they understand that Donald Trump is a threat to everything they care about," the Virginia senator said in an exclusive interview with ABC News' Robin Roberts on "Good Morning America" today.

"We got to pull it together to win," he added.