Keeping faith with American workers, national security: These are two critical yardsticks for choosing Maryland's next U.S. senator. Take the measurements, and the results will demonstrate that U.S. Rep. Chris Van Hollen is not the right person to represent our state in the Senate. He has forsaken American workers. On national security, he helped Iran and harmed America. Kathy Szeliga, his opponent in the Maryland U.S. Senate race, will do a far better job.