Joe Biden has vowed not to stay silent about politics. | AP Photo Biden votes, but keeps mum on his choice

Joe Biden’s made a decision in the Democratic primary race — but he won’t say whether he picked Hillary Clinton or Bernie Sanders.

The vice president and his wife, Dr. Jill Biden, voted early while back home in Wilmington on Friday, four days before the Delaware primary on April 26, when Pennsylvania, Connecticut, Rhode Island and Maryland will also vote.


Biden, who was deep in discussions about running himself before dropping out in October, has vowed not to stay silent about politics.

And he hasn’t when it’s come to the Democratic primary, often making comments that sometimes seem to cut at Clinton and Sanders, sometimes seem to support them. Sanders, for example, has eagerly seized on Biden saying in an interview with CNBC and The New York Times, “I don’t think any Democrat’s ever won saying, ‘We can’t think that big — we ought to really downsize here because it’s not realistic,’” seeming to mock what has been one of the responses from the Clinton campaign to Sanders. “C’mon man, this is the Democratic Party! I’m not part of the party that says, ‘Well, we can’t do it.’”

But in the same interview, praising Sanders for having big ideas, he said, “But what I don't see enough of is the explanation of how to do that,” which itself echoes one of Clinton's central critiques of Sanders.

As for how he voted, though, the vice president is staying silent on that. His office wouldn’t comment on which candidate he picked.