"I think if you run away from who you are, that you're a Democrat and you're proud to be a Democrat, it's foolish. And the reason it's foolish is you've got a lot to be proud of"

In this quote, Tim Kaine is mentioning that it is not a good idea to refute or hide one's political identification as a Democrat, as there is a whole lot to be happy with within the celebration. Essentially, Kaine is encouraging individuals to possess their political ideas and not shy away from them.