While I agree with the urgent need for coalition, and the importance of being open to differing viewpoints in obtaining coalition, I adamantly disagree with the goal of 'stopping Trump'. There is a list of assholes that will replace Trump if/when we stop him. That will not get us out of this mess. I also do not believe we are strongest when we are 'against' something, but rather when we are 'for' something. We did not get LGBT rights by being against bigotry or bigots. We got them by being for all people.
We can be for socialism, or for protecting the environment, or for social justice and equality, or higher wages. What we really need is an encompassing umbrella that we can be FOR. Dumping Trump could land us in hotter water than we are already in. Pence as an improvement? I don't think so. Frankly, he will just be 'smoother' and less antagonistic in forwarding the same, or worse, agenda.
What shall we be FOR?