Lean R.
Bookmark this thread, quote and mock the "Lean R." part of this post the day after the election when it’s clear that Sanders won it by more than Clinton, and cite it to prove that "Atlas" and IndyRep told you that Bernie would lose Loudoun County, Virginia.
Notice that I did not even include Lean R as an option here.
In fact there is a better chance of Missouri voting for Bernie Sanders than Fairfax/Loudoun/Prince William voting for Trump. Much better.
But there will be a pro-Trump swing.
What kind of people that voted Clinton would support Trump?