He's got some stones and serves as an example to our elitist U.S. politicians who talk pro war but make sure their sons and daughters don't have to serve.
I've seen this argument many times before. But keep in mind some of the counter arguments:
1 If you don't have children of age, can you really fault them?
2 What about female children, traditionally we don't have military expectations for them
3 You can't make children join, it doesn't work that way
4 If one statistically compare Congress and the general public (including children, nephews, etc). Congress actually has a higher enrollment rate then the general public.
5 High public officials (Congress, presidents, etc) personally have very high military enrollment rates.