Vice President Joe Biden says he “would have been the best president” if he had mounted a successful campaign in the 2016 election, but that forgoing the race was the right decision for his family.

Speaking with “Good Morning America” co-anchor Robin Roberts in an exclusive interview that aired today, Biden said he had planned to run but changed course only after his eldest son Beau died last May.

“No one should ever seek the presidency unless they’re able to devote their whole heart and soul and passion into just doing that,” he said. “And, Beau was my soul. I just wasn’t ready to be able to do that. But, so, my one regret is my Beau’s not here. I don’t have any other regrets.”