|Joe Biden at Sept. 12, 2019 debate | Win McNamee/Getty Images|
|Julian Castro at Sept. 12, 2019 debate | Getty Images|
The exchange provided two main observations. Ageism is a dangerous strategy when the top three nominees are over 70. Secondly, the media establishment and Democratic-leaning commentariat are beginning to move toward Biden due to 1) his survival after three months of debate attacks, 2) the contrast his image and demeanor provide to Trump (highlighting Trump’s main weakness), and 3) polls that seem to confirm electability (the top nomination criteria).