Democrats can't knock Trump off his game. His support among GOP lawmakers remains rock solid. Republican voters love him. And now a key witness in the impeachment inquiry says he saw nothing wrong with the Trump-Zelensky phone call. Are Democrats fighting a losing battle by trying to impeach Trump? And will they pay a price in 2020? CNN senior reporter Vicky Ward guest hosts and discusses Trump's resilience and potential weaknesses with S.E. Cupp, the host of 'SE Cupp Unfiltered,' and CNN legal analyst Jennifer Rodgers.