[AnimalMuppet]

You need step 1 in order to do gerrymandering; you can't do it by gerrymandering. (Though you can maintain it by gerrymandering.)

And, you can't gerrymander the Senate without moving state borders. That's beyond the power of any state legislature. So if you meant that to be a bootstrap path, it fails, because you can't use step 2 to cause step 3.

The one exception to the above would be if you allowed the state legislature to appoint the senators for that state. To do that, you'd have to repeal the 17th Amendment.

And, you need 3/4 of the states in order to ratify a constitutional amendment.