You will find Clark has little respect among veterans or active duty military. He was a political general and a Friend of Bill who was promoted ahead of more able people. While highly intelligent, he makes poor decisions. He also has a ego that is extreme. Clarks's professional commentary on the Iraq war was almost all wrong, embarrassingly so for a professional military man. He has never held any elective office - I suspect if you Dems pick him you may find him displaying Perot-like tendencies to weird-out people.