Pence and Kaine debating each other will, on substance, look no different than Barack Obama and Mitt Romney in 2012, but also of Walter Mondale and Ronald Reagan in 1984, but it seems pretty clear that by the time the 2020 election rolls around, this partisan dynamic will have changed. Trump’s campaign has demonstrated that the GOP can no longer assume working class whites will vote for their economic royalist policies, while the Democratic primary made it clear that younger Democrats are no longer content with the incrementalism with which the Clintons have defined the Democratic Party for more than a generation. It is not clear what the next iteration of the American political party system will look like. The GOP might look very different after a Trump defeat or victory. It is also possible, although much less likely, that an opening will be created for a new party, but it is very hard to imagine the system returning to what it has looked like for the last 30 years.