WI? No/Limited Vietnam?

What would American politics (I'm looking specifically at the '68 election) be like without such a prominent Vietnam? I think LBJ would have been a lot more popular with his Great Society programs, do you guys think he would have run? If so, would he have won?
 
No the POD would be somewhere around 1960 with Kennedy deciding not to sent in military advisors. Or better yet in the 50's Have France not loose Vietnam in the first place.
 
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