You mean if they lost? How many riots have there been in Oregon when the candidate Oregon shows didn’t win the electoral college? Trump lost the popular vote in 2016, but we didn’t see riots in Oregon.

That’s not your best argument against a national popular vote agreement. The best argument is that no national campaigns would give a shit about Oregon if the goal was winning the national popular vote. Oregon is a progressive coastal state, but it’s still a flyover state.

In fact, states wouldn’t matter at all. State borders are just imaginary lines drawn around population centers. Campaigns would focus exclusively on demographics and high density population zones. Oregonians as a demographic would be considered “safe” for progressives and “lost” for conservatives, so neither side would give them much effort. California Republicans and Texas Democrats would be the big winners. States like New York and Florida would become the new battlegrounds, as candidates spoke to the concerns of the most people.

And in a way, that would be much better. It would encourage more voters to actually show up, and local races would become more important. But with first past the post, winner take all national elections, you’ll still have two parties demonizing the other.