The consensus on here - that France and the US are mostly likely - is probably correct.
But nowhere can be complacent, especially given how so much of the previously mainstream right in the West is being captured by Orbanism.
in addition to the US and France having more polarized politics and societies it's also simply easier to turn a presidential system in an authoritarian direction than a parliamentarian. In principle the absence of a written constitution in the UK makes it easier, but I doubt that would be true in practice. I actually think it's easier to see the French military accepting an authoritarian government than the American and France is a unitary state, so while I voted for both I'd say France is the least unlikely. In the US many states would try to actively disobey and obstruct an authoritarian president and I doubt the army would agree to suppress political dissent. The German constitution was deliberately set up to prevent an authoritarian government and while there are right wing elements in the Bundeswehr I just can't see them tolerating an authoritarian Chancellor or all of the individual länder going along. Spain has a right wing dominated "deep state" but has its autonomous regions and a strong antifascist legacy in civil society so there would be more resistance than in France.
From most likely (least unlikely) to least likely:
France
US
Spain
UK
Germany
Poll
