Bourbon
Bourbon is an American whiskey, a type of distilled spirit, made primarily from corn and named for Bourbon County, Kentucky. It has been produced since the 18th century. Bourbon must be made of a grain mixture that is at least 51% corn.
Woodford Reserve is popular among DC mixologists, and Evan Williams (http://www.evanwilliams.com/main.shtml) is an affordable mid-range bourbon.