What you do should fall natural to you.
You talk with other people friends family and coworkers.
And you meet with those that agree that Trump has to be stopped, and put your heads together on what you can do.
And you reach out to other groups that do the same.
All this can be done perfectly legal without risk in USA, because USA has not fallen so far yet to prevent that.
Then all the groups that are near each other communicate with each other, until you have grassroots on the state level, and the state level communicat4e on the federal level.
You call out on social media for people to do this, and a grassroots movement can be created very quickly if the interest is there.
I am not American, so it is not really my place to meddle in local American politics, USA is a democracy, and movements like this can be created absolutely unhindered.
Your defeatist attitude is what is preventing it, and apparently all of USA is suffering from it.
We are very carefully trained and punished in compulsory K-12 education to comply with authority per John Taylor Gatto.
Bullshit. Pure and simple Bullshit. This puts you in the coward category unless you break free of that.