The presiding spirit of this neo-secessionism is a resistance to majority rule. We see this in the Senate, where a Democratic majority is resisted at every turn by automatic recourses to the filibuster. We see it in the attempt to repeal the seventeenth amendment, which allows a majority of voters to choose a state’s senators. The repealers want that choice to go back to the state legislatures, where they rule thanks to anti-majority gerrymandering.
The Old South went from virtual to actual secession only when the addition of non-slave Western states threatened their disproportionate hold on the Congress and the Court (which had been Southern in makeup when ruling on Dred Scott). It is difficult to conjecture what will happen if the modern virtual seceders do not get their way. Their anti-government rhetoric is reaching new intensity. Some would clearly rather ruin than be ruled by a “foreign-born Muslim.” What will the Republicans who are not fanatics, only cowards, do in that case?