NCR electoral college of brahmin ranchers voted him in :p
They have dirt on him for sleeping with a ghoul prostitute and so he can be manipulated in office. He's a "good'ol boy" you could say.
Kimball was a General who led a campaign to eradicate various hostile raider tribes from NCR territory, namely in the southern Mojave near Bullhead City and Owens Valley near Shady Sands and Junktown. He was riding high off of an overwhelming millitary victory within NCR borders.
They have dirt on him for sleeping with a ghoul prostitute and so he can be manipulated in office. He's a "good'ol boy" you could say.