First past the post can only be beaten if you manage to swell enough support for a third party to be viable and not split your vote. And because of maths, this is a huge obstacle to overcome.

Some back seat democracy for ya (I am not from the US, from Australia): you need to hammer on about voting reform, and mostly voting reform, until you have it. This needs to be the number one issue in everyone’s minds until you have it.

“We need to beat Trump” is a band-aid at best, and is unlikely to win over any conservative voters to your cause (and, you will need them to get a third party to have any chance, in my opinion).

Your system is beyond repair without it (in my opinion).

Y’all need preferential voting, and/or proportional representation. Or whatever change means future reform is possible.

You already have multiple parties, who each stand no chance against the spoiler effect without a massive campaign to get democratic voters (and maybe some Republican voters) to switch to it.

Anything short of that means you’ll get another Republican government.

And at this rate, this means your barely-counts-as-a-democracy will be dead.