Former Vice President Joe Biden hinted at a 2020 presidential bid on Tuesday, telling a crowd at a conference of the International Association of Fire Fighters to save their energy because he "may need it in a few weeks."
When Biden took the stage, the crowd chanted and held signs reading, "Run Joe, Run."
"I appreciate the energy you all showed when I got up here," Biden said. "Save it a little longer, I may need it in a few weeks."
"Be careful what you wish for," Biden quipped.
Watch Biden's full speech: