It's on! Trump ('Con Don'), de Blasio ('worst mayor in US') trade vicious barbs

President Donald Trump and Mayor Bill de Blasio
Photo credit Photo by Anthony DelMundo/New York Daily News/TNS/Sipa USA, (Photo by Alex Wong/Getty Images)

NEW YORK (1010 WINS/AP) -- Mayor Bill de Blaso announced on Thursday morning via a YouTube video that he is entering the crowded 2020 Democratic presidential field.

De Blasio, 58, joins a crowded field of Democrats, including California's Sen. Kamala Harris, New Jersey's Sen. Cory Booker, Vermont Senator Bernie Sanders -- and another mayor, Pete Buttigieg of South Bend, Indiana.

"We built an agenda that put working families first." de Blasio says in the video. 

De Blasio's announcement was followed by an appearance on Good Morning America Thursday morning where he was joined by his wife.

De Blasio's announcement drew mockery from President Trump on Twitter.

"The Dems are getting another beauty to join their group. Bill de Blasio of NYC, considered the worst mayor in the U.S., will supposedly be making an announcement for president today. He is a JOKE, but if you like high taxes & crime, he’s your man. NYC HATES HIM!" he said.

Then, de Blasio responded: "I'm going to keep calling him 'Con Don' because that's what he deserves to be called,'' de Blasio said after declaring his candidacy. "He's a con man, and we New Yorkers know a con man when we see one.''

The New York Post gave de Blasio no quarter either, with a cover that featured people eating popcorn and laughing at the headline 'de Blasio runs for president.'

The Mayor, who is the 23rd Democratic candidate to enter the presidential race said putting money back in working people's pockets is what will set him apart from others in the crowded field.