I am going to go off topic a bit. You need to remember that VA is very competitive and the Senators talk so they can spread the wealth. Many of the Congressmen will also look at the Senators slates so they do not duplicate their slates with them. Occasionally a few will sneak through and get two, but the majority will only get 1.
There is a poster here that said their child got an interview with Warner, but not with Kaine (or maybe it was Weber), however he got the TWE from Warner and the nomination from the other. The reason why is as I stated before they talk. That is only my assumption!
Just plow ahead, prepare for the interview. It will be a committee and they can come at you from all different aspects. Do not expect to see Sen. Warner there, he may or he may not be there. My DS interviewed with Sen. Burr (NC). I remember some of the questions.
1. I see the only C on your transcript is AP Calc, can you explain that?
~ He not only had a ton of APs, and did jump start, but for his ACT he had a 34 M, so to them that stood out as odd.
2. Do you believe invading Iraq was a prudent decision?
3. As a military dependent, what was the best and worst thing in your mind about living that life as a military brat.
4. What was the last book you read that was not assigned reading?
If you go on the nomination forums and use the search tab, I am sure you will get a lot more answers about the VA nomination process there, than here. IE How long after the interview will you find out if you get the nomination.
PS, VA is a big state. Do not assume that they will do the interviews at only one place on one day. IOWS, just because 20 people are there that day in the holding area,don't think that is all they are going to interview for the nomination. They may hold them over a course of a few weekends. Plus, VA has many military members. They may also do phone/skype interviews for those kids. One of our DDs friends was an AF brat, Dad was moved to Germany their junior year. They did not sell their home or change their residency, that meant for him, his MOCs were in VA.