Which is fully appropriate where it exists.
I would be 100% against the US having a 'Constitutional Monarch' but I'm 100% in support of the UK Constitutional Monarchy, given that it has come from their long established culture, nearly a 1000-year-old 'contiguous-ish' institution.
FYI in 1258 the Monarch signed documents which required him to 'Confer with Parliament' when changing rates of taxation. That's only 40 years past Magna Carta, and the first reference to 'Parliament'.