Stay away from the border ..

Even if you are legally in the US: While planning travel, avoid border towns and the routes close to the border. Stay away from Arizona, upstate NY, areas of Texas ..

The Lake Shore Limited runs between Chicago and New York City without crossing the Canadian border. But when it stops at Amtrak stations in western New York State, armed Border Patrol agents routinely board the train, question passengers about their citizenship and take away noncitizens who cannot produce satisfactory immigration papers.

Altenate link: Immigrants on Trains Near Northern Border Detained - NYTimes.com