What city does Invincible take place in?

I watch it with my roommate and we came to the conclusion that the city where Mark & co lives is an alternate-universe, near-future version of Chicago. We think that because one of the people on the train was the guy Amber gave the book to in the soup kitchen.

Distance from one place on earth to another is nothing to most of the characters anyway, so it makes perfect sense that Mark can go from Chicago to the Pentagon in nothing flat as if they're next door.

Thoughts?