What will happen is your de facto dictatorship will become a de jure dictatorship. You can expect all the same moves you see in places like Russia and Turkey, like the elimination of term limits, the removal of balances on power, the formation of semi-formal paramilitary squads which can transition to death squads as required, and probably crack-downs on the media to prevent criticism of these things. Amerika already has concentration camps and a ready-made State media apparatus in Fox News, so it will happen quickly.
Of course, you’ll also see concommitant growth of radicalized elements in opposition to the new dictatorship. Most liberals already lean authoritarian and have spines of Jell-O, so they’ll either become Good Germans or just keep pretending not to see, but a small percentage will realize that we anarchists have been right all along and begin the usual process of forming cells of resistance in a race to see whether they can learn the basics of paranoid security culture faster than the secret police can infiltrate them.
Depending on how violent the reactions grow, you may also see the entire Internet shut down while the new dictatorship cleans house and seizes control of social media to prevent any kind of wide-scale organizing. We know from Snowden that these plans are already in place. You may wish to make sure you have currency on hand, since taking down the Internet is likely to play havoc with online banking, ATMs, and debit machines.
You’re also going to have to decide how much you value your life under dictatorship, and whether you’re prepared to spend whatever remains of it on your knees.
“Still if you will not fight for the right when you can easily win without bloodshed, if you will not fight when your victory will be sure and not so costly, you may come to the moment when you will have to fight with all the odds against you and only a precarious chance for survival. There may be a worse case. You may have to fight when there is no chance of victory, because it is better to perish than to live as slaves.” – Winston Churchill