What I mean is this:
Democrats are still in a geographical crisis. The core blue states such as Illinois, New York, Michigan, Massachusetts are set to lose electoral votes. So my theory is that Democrats must pick a nominee from a red state that could trend our way (i.e. colorado, arizona, new mexico, nevada, notice a pattern here) to expand our electoral base, presidentially.
The Republicans rarely nominate someone from a Democratic state. The only times that the state was to the left of the country as a whole in the previous election in modern times were Nixon 1960 and Ford 1976. Both lost.