It's bad, but not quite as bad as it sounds. They still need 2/3 of both houses on Congress. There is a mechanism for a constitutional convention, but it has literally been used 0 times, and no one even knows how to do it or what the legal requirements are. Seriously. It's in the Constitution, but since it's never been used it is unclear how it could be used, as normally these matters either operate on tradition, the history of court decisions, or both. Here, there are none, so it is unlikely to occur suddenly. Therefore, as long as greater than 1/3 of both houses stay Democrat (likely, given that Dems get more of the cumulative vote in House races in most elections--that's how gerrymandered we are), we're safe from oppressive bullshit that these theocrats might dream up.