NEW YORK - Presumptive Republican presidential nominee Donald Trump Monday shot back at David Cameron after the British prime minister slammed Trump's plan to ban Muslims from entering the US.

"Number one, I'm not stupid, OK? I can tell you that right now - just the opposite," Trump said in an interview with British television channel ITV, a partner of an American network - NBC News. "Number two, in terms of divisive, I don't think I'm a divisive person. I'm a unifier, unlike our president now, I'm a unifier."

Cameron called Trump's proposal to ban Muslims from entering the US "divisive, stupid and wrong."

Trump said it looks like the countries are not going to have a "very good relationship" if he wins the White House in November. "I hope to have a good relationship with him, but it sounds like he's not willing to address the problem either," Trump said. A Cameron spokesman on Monday said the prime minister stands by his comments, according to press reports. "The prime minister has made his views on Donald Trump's comments very clear,” the spokesman said. “He disagrees with them."

In the same interview, Trump said he "doesn't care" about how Sadiq Khan, London's new mayor, views his presidential campaign, adding that he's offended by Khan's comments.

Sadiq Khan criticized Trump's comments on Islam and said he has an "ignorant" view of the religion and does not deserve the White House.

Meanwhile, according to a report in The New York Times, Trump plans to throw Bill Clinton’s infidelities in Hillary Clinton’s face on live television during the presidential debates this fall, questioning whether she enabled his behaviour and sought to discredit the women involved.

Trump will try to hold her accountable for security lapses at the American consulate in Benghazi, Libya, and for the death of Ambassador Christopher Stevens there, the report said. And he intends to portray Mrs. Clinton as fundamentally corrupt, invoking everything from her cattle futures trades in the late 1970s to the federal investigation into her email practices as secretary of state.

Drawing on psychological warfare tactics that Trump used to defeat “Lyin’ Ted” Cruz, “Little Marco” Rubio and “Low-Energy” Jeb Bush in the Republican primaries, the Trump campaign is mapping out character attacks on the Clintons to try to increase their negative poll ratings and bait them into making political mistakes, the Times said, citing interviews with Trump and his advisers.

Another goal is to win over skeptical Republicans, since nothing unites the party quite like castigating the Clintons. Attacking them could also deflect attention from Trump’s vulnerabilities, such as his treatment of women, some Trump allies say.

"For Mrs. Clinton, the coming battle is something of a paradox," the Times said, adding, "She has decades of experience and qualifications, but it may not be merit that wins her the presidency - it may be how she handles the humiliations inflicted by Mr. Trump."