[rsynnott]

I mean, see, say, South Korea. Or, for a less spectacular example, see Boris Johnson's defeat in his attempts at a bit of tinpot dictatorship of his own: https://en.wikipedia.org/wiki/R_(Miller)_v_The_Prime_Ministe...

Really, in democratic societies there are three levels; those where the offending politician is actually deposed, those where their unconstitutional action is blocked by the courts or by another arm of government (as with Boris), and those where _they never do the thing in the first place because they realise they can't get away with it, and there'll be unpleasant consequences for them_ (this is by far the most common, particularly in parliamentary democracies, where Dear Leader can be fired at a moment's notice). If none of these happen, then typically the democracy ends.

The US is probably unusually vulnerable to this sort of thing; it has an unusually powerful executive, and a highly politicised Supreme Court, in particular. Though, it kind of remains to be seen how far the Supreme Court will be pushed. Some or all of Trump's appointees may take the view that they got into the job to screw over minorities and aid business, but not necessarily to actually end democracy in the US. They are likely not all that beholden to him.

[pjc50]

R v Miller was important but ultimately overtaken by events - while Parliament did want to discuss Brexit, they were unable to find a viable solution and we still got no-deal Brexit where vital things like the status of Northern Ireland had to be patched up later. For whatever insane reason, the demand to eject us from the Single Market was just too strong.

[rsynnott]

To be clear, there wasn't a no-deal Brexit in the end. There was what was originally called a hard Brexit (https://en.wikipedia.org/wiki/Brexit_withdrawal_agreement), but a no-deal Brexit would have been far worse.

R (Miller) v The Prime Minister (not to be confused with R v Miller, or R (Miller) v Secretary of State for Exiting the European Union (the solution here is clearly to just stop naming people 'Miller', to avoid further confusion)) was probably ultimately more important in its precedent than its concrete outcomes, though, yeah.