If Hillary is the Democrat nominee, who might her VP be? Does it really matter?

[Blue3]

Possible nominees
- Mark Warner
- Martin Heinrich
- Sherrod Brown
- Julian Castro
- Steve Beshear
- Martin O'Malley
- Tim Kaine

All bring something different to the table but does it really matter?

I don't think the VP nominee will really matter unless he/she is a terrible campaigner or is Palin-esque.

But of those choices...
-Warner was sued for sexually harassing his female employee
-Julian Castro in inexperienced
-Steve Beshear, while good, is old and not progressive enough for today's base
-Martin O'Malley is boring and has no vision
-Tim Kaine is just off, I don't trust him

[Blue3]

-Martin O'Malley is boring and has no vision

I think O'Malley has more vision than most actually. He's one of the very few Democratic Governors who's got a lot progressive stuff done in his state during the past decade or so actually. Executive action always trumps visionary ideas anyways, in my view at least.
However I do agree that he's not all that great in interview situations. He's much better when he's prepared his stuff/speech.

O'Malley hasn't been leading his legislature, they've been leading him and he's been rubber-stamping.