The biggest problem is the northern counties of Fairfax, Loudoun, and Prince William were flooded with Third World people who were given citizenship and all vote for Communists. Those same counties also have a lot of voter fraud by the Democrats.
Also, way too many people from Maryland and DC moved down here and they brought their leftist voting habits with them. There are now so many of them in the northern counties they overrun all the good people in the rest of the state.
Here in Stafford County (just south of Prince William County and only 35 miles from DC) the leftists have almost taken over. When I was stationed in DC and bought a home here in 1992 there were about 50K residents in the county and it voted about 85% or more conservative. We now have about 150K residents and vote 51% conservative.
The only good thing left in my county is the last Democrat was voted off the County Board and replaced by my friend and neighbor, who is a staunch conservative.
New York is much the same. Trump won 46 out of the 62 counties.