Obama Takes Aim At Donald Trump And His 'Crazy Conspiracy Theories' In DNC Speech

Former President Barack Obama walked out to a heroes welcome at the Democratic National Convention in Chicago Tuesday night, telling the crowd he's "fired up" and "hopeful," and giving a rousing endorsement of Kamala Harris as the next president of the United States.

"We have a chance to elect someone who has spent her entire life trying to give people the same chances America gave her. Someone who sees you and hears you and will get up every single day and fight for you," Ohama said.

Obama also praised his running mate, President Joe Biden, for "putting his own ambition aside for the sake of the country.

"History will remember Joe Biden as an outstanding president who defended democracy at a moment of great danger," he said.

The fiery messages from Obama and former first lady Michelle Obama just before him - the Democratic Party's biggest stars -underscored the urgency of the moment as Harris works to stitch together a broad coalition in her bid to defeat Trump this fall.

She is drawing on stars like the Obamas and other celebrities, officials from the far left to the middle, and even some Republicans to boost her campaign.