In his “Silver Bulletin” newsletter on Monday, the co-founder and former editor-in-chief of polling analysis site FiveThirtyEight wrote that his outlook on the potential rematch between 81-year-old Biden and former President Donald Trump, 77, has significantly changed since a year ago. Silver circled Biden’s age and his refusal to sit down for big interviews, such as the traditional Super Bowl interview, as top concerns for his campaign. 

“If you’d asked me a year ago, I would have told you that Joe Biden was a reasonably clear favorite in the event of a rematch against Donald Trump,” Silver began, adding later in his article that in recent months, “Biden’s situation has become considerably worse.”