Lot's of fallacies and wishful thinking here.
At least Brian pointed out the inevitability of the "Blue Wall" in the Electoral College, but there are other needed corrections such as -
- Libertarians, by their very nature, don't vote
- Do all the wishful thinking you want of youth's 'growing out of their Progressive nature,' says nothing about the consequences of the demographics of an increasingly minority majority.
- Don't mistake the results of the past decade of gerrymandering in the House and a flawed governmental organization principle of giving two senators to puny population states as providing any political power other than to say "no" for a few more years
- If you're still holding onto the notion of no difference in party, sunshine, then you should be okay with Cotton's channelling Rumsfeld with our needing just 6 days of bombing to get those pesky Iranians under control or Ted Cruz telling us that a SCOTUS decision legalizing gay marriage would be "fundamentally illegitimate."
As for the "great divide," I'm going with biological. There's those whose cerebral cortex are in control and those whose cerebral cortex get overridden by the more primative xenophobic, fight-or-flight amygdala -
http://www.psych.nyu.edu/jost/Jost-Amodio-2012.pdf
Oh, as for the theory of Progressive youth becoming with age something like today's 'conservatives" - I caulk that up to early-onset dementia.