Transcript for Obama: Trump's Presidential Run is an 'Infomercial'

President Obama is holding a series of high level meetings here in New York as he attends his final UN general assembly. Before he leaves office a president me 101 today with the premier of China before sitting down. With the Iraqi prime minister and tomorrow he'll host a summit on the global refugee crisis. The president arrived in New York yesterday to headline the democratic fund raiser in Manhattan he slammed Donald Trump saying he has no interest in gaining the knowledge required to be president. On Saturday he told the Congressional Black Caucus if African Americans want to give him a good send off they must vote for Hillary Clinton. It will consider it a personal insult an insult to my legacy that this community lets down its guard at Bev to activate itself. And that the lack. The president also left off the fact that front is finally acknowledged she was born in the United States saying. Here's an extra spring in his step now that the whole birth of thing is over.

This transcript has been automatically generated and may not be 100% accurate.