Sean Smith was a fervent Obama supporter in 2008 according to his Mother.
The Ambassador was a close friend of Hillary Clinton's. That's not a precise indicator of his personal politics, however. That's all the info I have.
They probably wouldn't have gotten a ballot anyway. http://thehill.com/blogs/floor-action/senate/265925-gop-senators-thousands-of-ballots-unlikely-to-reach-military-voters