4:49 After more than two decades of representing Wyoming in the United States Senate, Mike Enzi is retiring. Some of his colleagues say his departure is going to leave a huge deficit in the upper chamber. Enzi first came to Washington in the sixties to get his bachelor's degree in accounting from George Washington University. After heading home, he served in the Wyoming Air National Guard, was Mayor of Gillette, then spent time as a Wyoming State Representative and a State Senator. He came full circle in 1997 when he came back to Washington as U.S. Senator Mike Enzi. But he's glad that time has come to an end.