But the campaign spokesperson declined to comment on whether the mayor would announce a presidential run Thursday, only confirming his travel plans and appearance on "Good Morning America".
The mayor would be the 23rd Democrat vying for the Democratic presidential nomination, following Montana Gov. Steve Bullock, who announced his own candidacy on Tuesday.
He made several previous campaign-style trips to states expected to play a role in the Democratic nominating process.
De Blasio has been mulling a presidential run for months, visiting states like New Hampshire, Nevada, Iowa and SC - travel which is reportedly being bankrolled by the mayor's federal political action committee Fairness PAC. "Cut your emissions or we'll cut something you really care about: We'll take your money".
But the attention-grabbing location also drew supporters of President Donald Trump who jeered and heckled the mayor as he hollered to make himself heard.
On Monday, de Blasio seemed to be laying the groundwork for an announcement by holding a news conference in the lobby of Trump Tower to blame the skyscraper for contributing to air pollution.
The mayor's attack prompted Eric Trump to hit back.
"1/4 The fact that the Mayor of a major city would attack an iconic organization (which employs thousands of hardworking NY taxpayers) for his own political gain is an abuse of power, unethical and simply counterintuitive", he wrote.