The name of the former chief-of-staff is Dave Nelson. This is the name of both of the Twin Towers. It's also the name of Dave Foley's character on NewsRadio, which was also set in New York City, and was on the air at the same time.
At the time of her appearance on this show, Constance Marie (Gabby Sanchez) was also playing another woman named Gabby on the NBC sitcom, Union Square. However, on Union Square, she played a struggling actress named Gabriella Diaz.