the east coast. i'm gregg jarrett. welcome to a brand-new hour inside america's election headquarters. >> heather: i'm heather childers. radar showing the storm's enormous size. it's potential to effect 50 million americans. at least 5,000 flights have been cancelled and amtrak suspending service up and down the eastern corridor starting tonight and largest mass transit system in the country shutting down, effectively bringing new york city to a standstill. president warning people to take this seriously because sandy could possibly be the biggest storm to ever hit the united states mainland. >> my first message is to all the people across the eastern seaboard and atlantic going north that you need to take this very seriously. follow the instructions of your state and local officials because they are going to be providing you with the best advice. >> gregg: this storm is in the