The upcoming midterms should scare everyone. Even Republicans.
It is safe to say that barring a miracle, the midterms are going to go very well for Republicans and very poorly for Democrats. The party in power generally loses during the midterms, and the situation in the US is even worse than normal right now. Biden's one accomplishment has been an infrastructure bill. He does have the chance to nominate a Supreme Court justice, and has signaled intent to base his appointment on race and gender, and then qualifications. If the Republicans fail to give sufficient opposition, the Democrats won't be able to say "you only opposed her because she's black and a woman, you racists and sexists." Since this appointment does little to the balance of the court, the Republicans have little to gain by a fight.
Now that the stage is set, here's the implications.
Right now, 30 state legislatures are Republican, 17 are Democrat, and 3 are split. If Republicans do well, the splits can easily go Republican. If just one more legislature flips, that makes 34 states Republican. That is the magic number to call a constitutional convention.