[jltsiren]

Most European countries have proportional elections, at least for some levels of the government. Such elections give a pretty good idea of the popular support for various ideologies. On the average, parties that are broadly aligned with US Republicans get ~25% of the votes, though there is a lot of variation from country to country.

[Tainnor]

Even many the parties that are otherwise "broadly aligned with US Republicans" fundamentally disagree with Trump on Ukraine, such as FN, FdI, PiS, ...

Of course, there are AfD and Fidesz, but they occupy the minority position even within that spectrum.