Go to a third world country. You can buy cheap house and land there. Start your own business. 2 million dollars can go a long way.
If you really believe the US will default, shouldn’t he convert it to a basket of Yen, Euros, and a few other smaller currencies ? 
Put it aside and don’t touch it for the next year. Go to work every day like nothing changed, set appointments with a financial adviser, consider all the things you are going to want to do with your life and how that money might help. Do you want to set up a trust fund for each of your children? Pay off the mortgage? Travel? Switch to a career that pays very little but has always been your heart’s desire? Take the time to figure out exactly what you want and exactly how the money will work for you before you touch a dime of it.