this morning, joe biden teasing a possible presidential run during a speech just moments ago. >> run, joe, run. >> thank you, thank you, thank you. >> and he's not trying to quell all of this speculation. he is taking the stage to those chants of run, joe, run as he and his wife attend an international firefighters association event. let's get right there. it seems like he gave his biggest tease yet. >> reporter: poppy and jim, joe biden is not a candidate yet but he sure sounded like one at moments during this speech. he is still here talking to firefighters at this conference. you heard him talk a little bit about the message that he could potentially bring to a campaign. he talked a lot about middle class and working class concerns