“I thought I could beat Hillary. I thought I could beat anybody that ran,” Biden said in an interview with CNN’s Michael Smerconish that aired Saturday. “No one should run for president unless they think they can do that.”

Biden announced his decision not to run alongside President Barack Obama and his wife, Jill Biden, during a press conference in the Rose Garden of the White House last October, ending widespread speculation about the former senator’s political future.

Biden has repeatedly said the decision not to run was solely based on the death of his son, Beau Biden, last year.

“I didn’t run — not run — because Hillary was running. I didn’t run because my son’s not here. Period,” Biden told Smerconish.