The entire universe rotates?

[Darren_Garrison]

Earlier thread

The Universe is spinning

According to this article, the universe may be spinning. Spinning with respect to what? It doesn’t seem there would be anything to measure the spin relative to so the only thing I can think of is there’s evidence of some kind of centrifugal force (which I can see might affect the measured Hubble constant). But how do you separate the notion of spin from the notion of a variable Hubble constant?