You're correct. That would include relatively recent Jewish immigrants (since c. 1980) and their descendants from other erstwhile Soviet republics as well. That population in the US is believed to account for perhaps 200,000+ people, mostly in and around NYC and in southern California. They definitely voted strongly for McCain against Obama in 2008, so that trend toward the GOP started even before the Obama regime.
Unfortunately, since they are mostly in deep blue states, they don't have much of an impact on presidential politics. However, as rmlew has pointed out here, they can have a definitive impact in local politics, helping to elect Bob Turner (R) in the special NYC congressional election last and one of their own, a Republican, to a NY State Senate seat.
Thanks justiceseeker93.