One easy way to see which European peoples took lasting influence is to list up the original country of the family of US presidents.
As context there
Before, at the start and during most of the time of the USA as sovereign country most immigrants in terms of volume came from what is now Ireland, then Germany-Germanic, and then what is now the UK.
Well... how many "Irish" presidents had the US ?
How many "German" presidents had the US ?
In total a few.
Ofc the ancestor families of presidents are somewhat mixed over time
But the overwhelming bloodline is.... English
Starting with English aristocracy-elite and transgressing to the elite nouveau riche of mostly English heritage.
When it is about the top-top elite: not much of a melting pot
Trump not only an outlier of that establishment... but also with a clear German bloodline an outlier (with BTW getting much support from also the fly-over states that are originally populated with.... Germanic immigrants)
Such a consternation.