Pardon my ignorance, but I don't believe RIPE is a US organisation or branch of the US government.
Any attempts by the US government to assert control of a foreign non-profit entity such as RIPE is only going to end in tears. I suspect would also empower those pushing to balkanise the internet should the independence of RIPE or ARIN be violated.
I'm not sure region specific intranets is a future anyone should want.