What will really change things is if (when) someone who is or was associated with the Trump administration is criminally indited (assuming that such a thing is possible with a compromised FBI). Once this happens and one or more people are facing jail time, they will start to testify against Trump. Right now it appears that if this happens there will be proof that the Trump campaign colluded with the Russians in the Clinton email hacks. Once such proof surfaces, Trump is toast. Even the Republicans will have to impeach him.
We should be grateful that Trump and those around him are both unpopular and incompetent. If Trump were popular and as competent as George W. Bush (a low bar), the Republic would be in serious danger.