Well, if worse comes to worst, and the Democratic Party is kept permanently out of power because of shenanigans like this, Democrats can simply switch parties and become Republicans and take over their party instead, wresting it away from the Trumpsters who currently dominate it.
One way or another, our voices will be heard. If we can't do so through the general election, we will do so via the GOP primary, reconstituting the liberal-moderate wing of the Republican Party in the process. At the very least, we should keep that option open.