Unless they add more charges, I don't think he will. Federal court means federal sentencing guidelines, and what they have charged him with, right now, just won't result in major prison time. I looked it up--the charges have a base offense level of 6--that doesn't even require prison time. That could increase if the Feds can prove some ancillary conduct beyond a reasonable doubt, but as it stands right now, it doesn't seem to me that he's really looking at a lot of time.
I'm wondering how the Commonwealth of VA is going to proceed with the violations of state law...Hopefully the prosecutor there will stick to his guns.