[deport]

Graham is the only member of the U.S. Senate to serve in either a guard or reserve unit. He holds the rank of lieutenant colonel.

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I didn't know that! Very cool!

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Not sure what that is trying to say... I guess it means serving while being a Senator..... There have been other Senators that have served in Guard or Reservie units....

[wimpycat]

I think it means he's the only sitting U.S. Senator who is also serving in a guard or reserve unit at the same time.