Unfortunately these early victories were before the system was so badly broken as today.
Because of the Republicans' refusal to add seats in either the electoral college or the House, compared with a Californian, a Wyoming resident gets not just 30 times the voting power in the Senate, but three times the voting power for both President and Congress.
It's also the case that 100,000,000 Americans are so brainwashed that nothing will sway them.
So I think the possibility of a landslide is distant.
Makes no difference. Trump must be defeated.
For the 10% of Americans who live in a swing state, get out there and vote for a Democrat. Nothing is as important.
Unfortunately, if you're one of the 90% of Americans whose Presidential votes are mathematically worthless because they live in a non-swing state, you can do as you please in the Presidential election (but vote for Congress and Senate anyway).
Mathematically, your best power for your Presidential vote in a non-swing state is to vote for a third party.