The ECB could change the dynamic a bit if they are aggressive on rates...
Never underestimate the ability of "foreign" central banks to upset the apple cart in America...
Remember it was a German rate hike that "caused" the crash in 1987... There are a lot of "butterfly's wings" out there in the global economy that are capable of starting chain reactions that could sweep the globe.
The Greenspan Era is ending...yet the new order has not been defined...but the Tectonic Plates are definitely moving.