Question: Former New Mexico Governor Gary Johnson and former Massachusetts Governor Bill Weld were the mominees for Libertarian Party presidential primaries, 2016; When was the last time a presidential ticket consisted of two state governors? 
Sentence (from "Libertarian Party presidential primaries, 2016"): The 2016 Libertarian Party presidential primaries and caucuses allowed electors to indicate non-binding preferences for the Libertarian Party's presidential candidate.
Relevant evidence: No