“There’s never been a day in the last four years I’ve been proud to be his vice president, not one single day.”
The Hill provides a short write-up  of Biden’s remarks, including a timely reminder of Paul Ryan’s jab at Biden on the issue of gaffes and ‘inartful comments’ at the VP debate:
It’s a mistake that adds to Biden’s reputation as a gaffe machine. During the 2012 vice presidential debate with Paul Ryan in October, Ryan teased  Biden about his habit of making gaffes.
“I think the vice president very well knows that sometimes the words don’t come out of your mouth the right way,” Ryan said.
Biden shrugged off the jab.
“I always say what I mean,” Biden responded.