Virginia Sen. Tim Kaine:
-Fluent in Spanish. Can bring more Latinos to the Democratic Party.
-Centrist/Center-left. Can appeal to independent voters, which you need to win elections.
-Safe choice. Kaine will not embarrass the Clinton campaign in Brooklyn.
-Balance. As a white male, Kaine can bring balance to the ticket.
-Brings Virginia to the ticket.
-Potentially brings Missouri into play. (Went to high school in Kansas City, Mo., if the Clinton campaign was wise, they would have him there throughout October.
When I think "balance," I think "boring center-left white guys."