i came out to give my civic vote. reporter: it s the young dynamic, brooke, that has really taken over this district and this county. the numbers are staggering in 2011 they had seven voting precincts in loudon county, now they have 98. 76,000 more registered voters have come into this county. it s one of the most fast growing, most affluent counties in the country. right now it s a key suburban battleground, especially that race between barbara comstock and jennifer wexton, a very tight, tight race. you appreciate the enthusiasm on both sides of the aisle. brian todd, thank you. let s take a deeper dive now with a reality check of what to look for tonight. john avalon, what do you have?