An all-powerful uniparty can do things like this:

    - deport or jail you without due process
    - ignore the law in service of its own ends
    - punish its enemies, pardon its allies
    - ignore the constitution
    - install loyalists in centers of power, oust dissenters
    - suppress media which challenges its hold on power
    - commit crimes
    - enrich its friends
    - declare its "plenary authority" to do the above

Brother, you are looking for the deep state under every rock and it is out in the sunshine, smiling at you.