Apart from the filibuster and some limited ability to create publicity, the Democrats have no power in Washington. The judiciary has no resources on its own to enforce the law and the Constitution as written. Trump ignores small demonstrations, and massive ones might invite a military response. What can the blue team actually do to protect liberal democracy under these circumstances?
Trump voters don’t appear to have any concerns about his lawlessness, but they do care about their pocketbooks. The Trump economy, including the red states, depends on blue spending. In all likelihood, a recession is on the way. Do what comes naturally and cut back; in particular, don’t buy anything from any company that is closely associated with the Trump agenda. Then sit back and watch Trump’s polling numbers collapse. He may not care, but his GOP enablers will.