In retrospect the postwar American world can be said to have gone off the rails in one of two places. Liberals will put the date in March, 2003, when the campaign to topple Saddam Hussein began. Although the action was supported at the time by both political parties, the outrage liberals felt at what they believed to be the deception surrounding the operation created a reaction that made the second critical date inevitable: the 2008 election of Barack Obama.Of course he's right, as regards Sanders and Trump. Only Clinton stands for trying to prop up the failing regime. She is the candidate of every remaining institution. Maybe that will carry her over the line, in spite of her felonies, in spite of her weakness.
Obama was regarded -- and is still regarded -- by many conservatives as possessing the same degree of delegitimizing characteristics now attributed to Donald Trump. In this view, the accession of Obama, not the invasion of Iraq, marked the moment Everything Changed. It also made the rise Trump historically inevitable. The chain runs thus: Iraq --> Obama --> Trump/Hillary. Where you start is optional. Where you end is unknown. Ironically September 11, 2001 plays an ambiguous role in the historiography. For some reason that date is regarded by some as occurring Before the Fall....
If political columnist Ron Fournier is right about this election cycle, it is less about achieving incremental policy change than precipitating a radical institutional change . In that case the current unpopularity contest can be seen as an deliberate process to increase instability by hoping the worst man wins, not in order to continue the status quo but to tear things down and start afresh.
But it can't stop the tide.