DONALD Trump and Hillary Clinton discussed her battle with Barack Obama to become president, Stormy Daniels has alleged in her autobiography.

The former porn star - real name Stephanie Clifford - made the claim in Full Disclosure, in which she lifts the lid on her alleged affair with the US president.

She says that in 2007, she and Trump were watching Shark Week in a hotel when he received a phone call from Clinton.

At the time she was running against Obama for the Democratic Party’s nomination to fight the 2008 presidential election.

Daniels, 39, writes in her book: “He had a whole conversation about the race, repeatedly mentioning ‘our plan’… Even while he was on the phone with Hillary, his attention kept going back to the sharks.”

Trump’s antipathy to Obama has been well documented and stems from 2011 when the then US president humiliated him during the White House Correspondents’ Dinner.

Obama mocked Trump’s support for the so-called “Birther” movement that claimed he was born in Kenya and demanded he produce his birth certificate.

Trump sat visibly furious during the speech and it has been reported that it spurred him on to run for the presidency himself.

But there was a time when Bill and Hillary Clinton were friends with Trump and attended his wedding to Melania at the billionaire’s Mar-a-Lago estate in 2005.

During the 2016 presidential campaign, Trump put that aside, repeatedly calling her “crooked Hillary” and egging on crowds chanting “lock her up” at rallies.

But after the election was over the president rowed back on his pledge.

He said pursuing criminal charges against Hillary Clinton would divide the nation and she had already "suffered greatly".

As well as revelations about the alleged plot between Trump and Clinton, Daniels also details her sexual encounters with the president.

She mocks Trump’s “smaller than average” manhood, claiming it resembles the “mushroom character from Mario Kart”.

Daniels also claims “he doesn’t even want to be president” and further alleges Trump offered her a spot on The Apprentice, even saying he'd help her “cheat”.

The White House has always denied the pair slept together.

But Trump has since admitted he provided hush money, claiming he only knew "later on".

Trump’s former lawyer Michael Cohen has pleaded guilty to a number of fraud charges in a case linked to an alleged hush money payout of $100,000 to Daniels.