The riverboat casino received a $163m renovation in 2005.
The voters also approved a riverboat casino, but state law would have to be changed before that could be allowed.
It is also the largest riverboat casino in the world.
There are over 17 riverboat casinos located in the District.
Despite the opening of two riverboat casinos last year, which added more than 2,000 jobs, Gary still has the highest unemployment rate in the state.
"Now she's lost her job on a riverboat casino," he said.
Since then, three riverboat casinos and one on land have failed.
Many riverboat casinos are also required to use a loss limit.
The machines will still be legal on the riverboat casinos that are moored throughout the state.
Columbia owned the riverboat casino and a 79% stake in its operating company.