State senators, like all US citizens, are free to travel just about anywhere, including Washington DC, and Hong Kong, for that matter. "Operating" in any of the

State senators, like all US citizens, are free to travel just about anywhere, including Washington DC, and Hong Kong, for that matter. "Operating" in any of these places is a different matter. State legislators are typically not full-time legislators, since legislatures are usually only in session part of the year. They have jobs or (more often) own businesses as well. They typically don't have any legislative business in the nation's capitol.