Fed Chair Nominee Warsh Says My Opinions Change When Facts Change; When Interest Rates Were At Zero, I Sounded Hawkish; Politics Have No Place In Monetary Policy, Regulation, Supervision; Asked If He Would Commit To Defending Fed's Cook, Says Fed Should Stay In Its Lane; Inappropriate To Weigh In On Supreme Court Case; Pending Case Before Supreme Court, Will Hear Results Soon; Will Follow Law, Supreme Court; Fed Independence Means Everything To Me