As president teeters, Jill Biden faces a critical juncture

USA TODAY - For more and to sign up click here Judy Kurtz She's served more than three years as first lady, but after President Biden's stunningly shaky debate performance and subsequent calls for him to step down, Jill Biden — and her potential power — are suddenly being thrust into the spotlight like never before. "It seems to be a make-or-break moment for the president, and I would say that Jill Biden will be…