QOTW April 23rd/06 3-III The Hunt For The Ring on: April 29, 2006 10:07
At length he resolved that no others would serve him in this case but his mightiest servants, the Ringwraiths, who had no will but his own, being each utterly subservientto the Ring that had enslaved him, which Sauron held
This indicates to me that no matter who controlled the One Ring, the Nazgul would still be subservient to Sauron, as he stillheld their Rings of Power