In a Huffington Post blog, Charles Ferguson said pressure from Hillary Clinton supporters in the Democratic Party led to many sources shying away.
In August, the opposition Republican Party voted to boycott debates on CNN if the programme went ahead.
It also said it would boycott NBC, which plans a mini-series on Hillary Clinton.
The latter series, still in the early stages of production, is set to star actress Diane Lane as the former First Lady.
Hillary Clinton, wife of President Bill Clinton, has been closely watched as a possible contender for the Democratic Party’s 2016 nomination since leaving her position as secretary of state under President Barack Obama in January.
In his blog, Charles Ferguson wrote: “When I approached people for interviews, I discovered that nobody, and I mean nobody, was interested in helping me make this film.
“Not Democrats, not Republicans – and certainly nobody who works with the Clintons, wants access to the Clintons, or dreams of a position in a Hillary Clinton administration.
“After painful reflection, I decided that I couldn’t make a film of which I would be proud. And so I’m cancelling. (Not because of any pressure from CNN – quite the contrary).
“It’s a victory for the Clintons, and for the money machines that both political parties have now become. But I don’t think that it’s a victory for the media, or for the American people.”
The Republican National Committee (RNC) had claimed both the CNN and NBC productions amounted “to little more than extended commercials promoting former Secretary Clinton” and “political ads masked as unbiased entertainment”.
CNN has not commented on the cancellation of the project.
thTjgqF2U6IThe US House Ethics Committee has voted to release its report on former Republican Representative…
ABC News has agreed to pay $15 million to President-elect Donald Trump to settle a…
South Korea’s parliament has voted to impeach President Yoon Suk Yeol over his failed attempt…
Israeli war planes have carried out more than 100 air strikes in Syria on December…
President-elect Donald Trump has threatened to impose 100% tariffs on the BRICS countries if they…
Syrian troops have withdrawn from the city of Aleppo following an offensive by rebels opposed…