Former Secretary of State John Kerry was overheard talking about the potential steps he would have to take to enter the 2020 presidential race.

Kerry, who has been campaigning for former Vice President Joe Biden, cited “the possibility of Bernie Sanders taking down the Democratic Party — down whole” as the reason for potentially entering the race. An NBC News analyst overheard part of the conversation while Kerry, 76, was talking on the phone in the lobby restaurant of the Renaissance Savery hotel in Des Moines, Iowa, on Sunday.