Yes, the logistics would be almost utterly impossible, but I am sure there are scum sucking liberals out there, having wet dreams, trying to figure out how they might do it.
It would take roughly 2 billion or so DHS jackboots to arrest or kill 30 million conservatives.
Even if they use 150 million to attack the Country, that would be 5 of them for every 1 of us, which is just fine. Those odds are very manageable.