sustained and meaningful control of the federal government

You want a one party system? I'm not a big fan of the Republican party but there are some issues they are championing at the moment like free speech. Back in the day that was the Democrats, and I have no doubts it will flip flop again at some point but that just goes to show how we need at least two parties to act as a check on each other.

Silencing your ideological opponents is great and all until it's you being silenced.