In hedging his assertion, Bharara clarified that, "It's very important to be clear that no one knows right now whether there is a provable case of obstruction", while simultaneously claiming that "there is also no basis to say there is no obstruction", according to the Washington Examiner. The former federal prosecutor in Manhattan attended Comey's hearing on Thursday.
The interview came days after testimony before the US Senate from James Comey, the former head of the Federal Bureau of Investigation fired by Mr Trump in May, who said Mr Trump had asked for assurances that he would be loyal at a dinner just after his inauguration.
Comey testified Thursday that he leaked a conversation of Trump hoping that Comey would back off an investigation into ex-National Security Adviser Michael Flynn, in hopes of prompting the appointment of a special counsel to take over the Russian Federation investigation.
Bharara was USA attorney for the Southern District of NY until March when he and 45 other US attorneys remaining as holdovers from the Obama administration were told to step down.
In his first televised interview since his firing, Bharara acknowledged that while it is true that Trump could fire Comey at any time for any reason doesn't automatically absolve the president of any obstruction of justice questions.
Mark Corallo, a spokesman for one of Trump's attorneys, argued on Twitter Sunday that it would not be unusual for Trump to reach out to Bharara and that if he refused to take Trump's call "he deserved to be fired".
Some of those who came to the president's defense this weekend did so in ways that seemed to contradict the declarative statements made by Kasowitz that Trump "never, in form or substance, directed or suggested that Mr. Comey stop investigating anyone".
Obstruction of justice has become a troubling narrative for the White House in light of former FBI Director James Comey recent testimony - and leaked memo - in which he alleged that - he felt at least - that Trump was directing him to cease the investigation into Michael Flynn.
Bharara said it was a very "weird and peculiar" thing for the President to have a one-on-one conversation with a person has been asked to investigate various things and is in a position hypothetically to investigate business interests and associates of the President.
The third call came in March, he said.
The officer said that it appeared Trump had been trying to cultivate some kind of relationship after they met in late 2016.
Bharara told Stephanopoulos that watching how James Comey's interactions with Trump and how his firing played out "felt a little bit like déjà vu".