With such a wide disparity between the political leanings of rural Virginians and Beltway-area bureaucrats, Virginia has become one of the most unreliable and unpredictable states in a presidential election.
Most of the beltway types are elite wannabees and hate Trump. The suburbs like Loudoun are a mixed bag but trending liberal. They won't swing much in this election and the best we can hope for is low lib turnout there. The black cities are difficult territory but Trump is trying his best to get his message to them. If he can get 20% of those blacks it will be huge. The rest of the state is 60-90% conservative and we need turnout here. There is some Trump enthusiasm, more than for Romney at least. But not a wave of enthusiasm yet. There's still time though.
In short Trump can win with high rural turnout, low lib turnout and some black defection. All three are difficult and he needs all three.