Very interesting - and starts me to thinking about 'cause and effect'.
Several questions arise - such as, does such thinking about 'swing state' importance, and placement of priorities on ONLY those states - beg the question of 'what would really happen' if monies were spent in other states - not just piddling amounts - but significant amounts.
It is quite possible that this 'polarization' of spending actually increases the polarization of the country - because there is no 'cross-pollinating', no exposing of those in 'solid' states to other ideas on how things can be.
A lot of cogitatin' creatin contracting of the ole grey matter muscles being stimulated by such an obvious source of potential mischief.