"court-packing" would mark a reversal of an opinion Biden expressed in 1983 while serving as a U.S. senator from Delaware. At the time, Biden spoke out against President Ronald Reagan’s bid to replace three members of the US Commission on Civil Rights.

During a Senate Judiciary Committee, Biden likened Reagan’s effort to that of former President Franklin Delano Roosevelt, who launched an unsuccessful bid to add six justices to the Supreme Court in 1937.

"President Roosevelt clearly had the right to send to the United States Senate and the United States Congress a proposal to pack the court. It was totally within his right to do that. He violated no law. He was legalistically, absolutely correct," Biden said at the time. "But it was a bonehead idea. It was a terrible, terrible mistake to make. And it put in question, if for an entire decade, the independence of the most significant body … in this country, the Supreme Court of the United States of America."
https://www.foxnews.com/politics/fla...d-idea-in-1983