The Trump Administration has never pretended that they would abide by election results. Trump has always stated that he would see what happens and make his decision then. While he is telling this to the press, he is telling his supporters that any result that does not have him winning will be fraudulent.
The GOP is doing everything they can to make sure that Trump remains President no matter the results of the election. The push to place another justice on the Supreme Court is part of this plan. GOP leadership knows that they cannot trust Chief Justice Roberts, who is a conservative, to vote in their favor no matter what. John Roberts is still a man of integrity, who will vote his conscience and will not place party over country.
Given this, the GOP needs a 6-3 super majority on the supreme court. It is highly likely that John Roberts will vote against the wishes of the GOP in the election issues that will come to their attention. Without the Supreme Court, the GOP will not be able to contest the results of the 2020 election with any chance of winning.
As of this writing, Donald Trump still refuses to commit to a peaceful transfer of power should he lose. His administration is also actively discussing ways they can circumvent the results of the popular vote. This would include convincing states run by the GOP to bypass any popular vote that does not go their way and appoint electors loyal to the GOP.
The Constitution only provides that each state appoint electors that will vote for the President. States have a long tradition of letting those electors get appointed based on the popular vote in each state, however, this is not a requirement. Some states have passed laws requiring this, but most certainly, not all have.
Should this happen, and should the Dems contest these actions in court, the GOP wants to make sure that a conservative Supreme Court is seated to ensure that the theft of the American Presidency can move forward with some pretense of legality.
We are now past the point where a civil war is a possibility. In my opinion, a civil war is now an inevitability. How that war looks is still a matter of contention. I highly recommend reading this article, published on medium.com:
In the meantime, if you own guns, I would highly recommend you clean them and make sure you are well acquainted with their use.