Joe Biden denied he is "angry" with Democrats who tried to remove him as their candidate ahead of this year's US election - as he said "democracy must be preserved" in an emotional farewell speech to his party's members, APA reports citing Sky News.
The outgoing US president was seen wiping away tears as he walked out to deliver a speech on the opening night of the Democratic National Convention in Chicago, Illinois, on Monday night.
He had been introduced to the stage at the United Center by his daughter Ashley for what was billed as his swansong.
It was followed by a four-minute-long ovation and chants of "thank you Joe" from those in the crowd.
"America, I love you," he replied.
In a nearly hour-long address, Mr Biden called Republican presidential nominee Donald Trump a "loser" and urged people to get behind Democratic candidate Kamala Harris ahead of this year's US election.
His speech came less than a month after he dropped out of the race for the White House following months of speculation about his age and his fitness to serve another four years.
Concerns increased among Democrats after a disastrous debate performance against Mr Trump in June and a series of high-profile gaffes.
Senior Democrats, including former US President Barack Obama, expressed their concerns about him running, while former House Speaker Nancy Pelosi, Mr Biden's long-time friend and ally, urged him to step aside.