FILE- In this June 7, 2017, file photo, former U.S. Vice President Joe Biden speaks during a conference in Athens. Biden is tiptoeing toward a potential run in 2020, even broaching the possibility during a recent gathering of longtime foreign policy aides. Huddled his newly opened office steps from the U.S. Capitol, Biden opened a planning meeting for his new diplomacy center by addressing the elephant in the room. He said he was keeping his 2020 options open, considering it a real possibility. (AP Photo/Petros Giannakouris, File)