It builds. The 2000 election would not have been possible without the weakening of the laws and safeguards that occurred in the preceeding years. Likewise, I don't think that a ban on the First Ammendment could have occured without the erosion of Two through Ten.
True, many changes in the world are gradual and where do you pick a line of demarcation? Make a subjective choice or say it is all relative so no choice can be made?
There is an advantage to this. If it's killed in the USSC, the "reformers" won't try this for another 25 years. It's so hard to convince people to be principled. We are. We care deeply about such things, but most people live on the margins. I don't think we serve ourselves well by overestimating the effects of these things.