Congressman Solly is a character who makes a one-time appearance in the Season 2 episode titled "Sins of The Past".
Jason Darius has opened a new casino on the island of St. Remo and has invited many guests to the grand opening. Among them is Congressman Solly, who comes accompanied by his girlfriend (unnamed, played by Suzanne La Rusch). Darius probably counts Solly as one of his influential friends on the mainland. He says he hopes Solly will tell his friends about his casino, which is the ideal setup, with no cameras, no watchdog committees or other complications.
Solly enjoys himself gaming at the tables with his girlfriend but leaves when Airwolf shows up to order everyone out of the building before blowing it up with its rockets.
The credits only list the character as "Solly". During the episode, Jason Darius addresses him as "Congressman". It is not clear if Solly is his first name or his last name. But his girlfriend calls him "Solly", which suggests that it might be his first name.