Time Magazine also has an article about the border rules:
Starting January 31, you will no longer be able to cross into the United States without any documentation at all. Yes, that’s right. Until now, believe it or not, you could come into the country from Canada with no papers — just your word that you were an American or a Canadian citizen.
If the border patrol agent believed you — based on your knowledge of the local school board politics of Flint, MI, perhaps, or maybe just that trustworthy glint in your baby blue eyes — you were in.
Now, despite furious opposition from certain border-state members of Congress and other people worried about anything that might reduce trade, the Department of Homeland Security is introducing a radical new plan.