Joe Biden: I could not run for President while son Beau was sick

Joe Biden has spoken movingly of the reason he decided not to run in the 2016 Presidential election in the US, as his son Beau battled a fatal cancer diagnosis.

The former vice President delivered an hour-long speech across a number of topics at Colgate University on Friday, before sitting down with the university's president, Brian W. Casey for a post-speech public interview.