The best thing the Democrats could do is focus on distinguishing themselves from GOP-lite. For too long, they’ve been “centrist” and that is confusing to voters. They need to show a clearly left, progressive agenda. The Green New Deal is the way to do that.
Everyone knows that Trump is master of the negative campaign, too. Even Roger Stone knew that. Those two men thrive on negative publicity in a way that mere mortals could never nope to match.
You are spot on about the way to remove Trump, and that is by election. But the means to convince the public that there is a reason to vote for Democrats is buried hip deep in The Green New Deal.