During a speech in Delaware, the former vice president told reporters that he did not want to discuss whether or not he backed adding more justices to the high court if he won the Nov. 3 election.
"We should see to it that the American public will vote in the Senate races in this election and they'll vote Republicans out of office. That's the consequence," he said.
Biden has long opposed the issue of court-packing, but Ruth Bader Ginsburg's death has revived the concept of expanding the number of Supreme Court justices in order to shift its ideological balance.