When are we going to start?
Now that we've got five people, immediately.

Those casualties are unrealistic (Russia has less people than that), I know. Just roll with it.
The nearest city to be nuked is St. Louis. The prevailing winds there (South) fortunately will spare Laclede County from most of the fallout.
The President and Congress have repealed all Constitutional rights and established martial law until order within the United States is restored.
Canada and Mexico are both overwhelmed with refugees and will likely be unable to care for them all.
Not everyone will realize it's the end of the world. Many, if not most, will expect order to be restored.
The people who do realize it's the end of the world are the hardcore preppers. They fled to their bug out locations when the bloc formed.
Lots of people will attempt to flee, even here.
Towns with a population over 2,000 (randomly generated number, sorry folks) experience riots and looting - I leave the extent in your hands, be reasonable.
Begin.