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.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...