By officially passing a resolution declaring the 2020 election results as illegitimate, The Texas GOP has officially embraced the notion that the present US Government is illegitimate; that Texas is under no constitutional obligation to obey Federal Law. That sure sounds like secession to me.
This is fundamentally different from the declaration of secession by the Confederate states in 1860, in fact, it goes well beyond it. At the start of the Civil War, the Confederacy claimed that the legitimate Federal government had exceeded its constitutional authority and that therefore, they were no longer under any obligation to defer to it. The fact that the Lincoln Administration had taken no action at all at that point in time is irrelevant. The Federal government was expected to abolish slavery, and that alone was anathema to the Southern States.
Incidentally, those of you who still promote the ridiculous fiction that secession was about constitutional or economic issues, I suggest you refer to the first declaration of secession, that of South Carolina, (“the cradle of the Confederacy”) reproduced here:
Do a text “find” on the character string “slave” and see how often it is mentioned in the text. OF COURSE IT WAS ALL ABOUT SLAVERY. It always has been.
In this case however, Texas Republicans have not claimed that the Federal Government has acted incorrectly or illegally, it is asserting that there there is no legitimate Federal government at all. I submit that even if Texas Republicans do nothing to act on this claim, they are essentially giving themselves the right to ignore any law, statute or legislation emerging from Washington DC that they choose to.
That sure sounds like secession to me. In fact, it sounds like treason.