Warren, Kaine, Castro on Clinton running-mate short list. Who do you think she will pick?

[Rochester]

42. If it's one of those three, I think Kaine would be the best choice

Here's my thinking:
Lizzie can fight the good fight better in the Senate. Furthermore, having two Northeastern women on the ticket only lends credence to the right wingers' notion that the Democrats are party of coastal elitists who have it out for men and for Middle America. That won't help in the swing states or down-ticket races (and, speaking as one of those Middle Americans, I don't want us to be a party of elitists, either.)
Julian seems a decent choice, but a little more experience might be preferable. Maybe next cycle.
Tim Kaine has executive experience, as governor, and Washington experience, as senator. Also, Virginia is getting bluer all the time, and Tim just might lock it up and take it off the table. The math looks good in that case - the Blue Wall (242) + New Mexico (5) + New Hampshire (4) + Virginia (13) = 264. ONE more swing state, out of at least six, puts her over the top.