De Niro, one of the most respected American actors, twice used the so-called F-Bomb against Trump on Sunday, prompting loud applause from the audience of theater actors, directors and producers at Radio City Music Hall. "He repeated 'F*** Trump" a second time and received a standing ovation from the crowd at the awards show for excellence in Broadway theater, held in NY.
De Niro continued to rant against Trump the next day, apologizing to Canada for "the idiotic behavior of my president".
Trump added a little name calling to the end of his missive, telling De Niro: 'Wake up Punchy!'
"Robert De Niro, a very Low IQ individual, has received to many shots to the head by real boxers in movies", Trump wrote.
"It's no longer 'down with Trump, ' it's 'f-k Trump, ' " the 74-year-old performer - who won an Academy Award for playing a boxer in 1980's "Raging Bull" - said. "I watched him last night and truly believe me may be 'punch-drunk'".
De Niro has attacked President Trump on previous occasions, describing him in 2016 as "blatantly stupid", "totally nuts" and an "idiot".
Yesterday De Niro apologised - not for his comments but on behalf of the U.S. president. De Niro, who's been cameoing as Robert Mueller on Saturday Night Live, was in Toronto today to open his new restaurant with celebrity chef Nobu Matsuhisa, Canadian Nobu. At this point, we all know that you can't publicly insult President Donald Trump without getting a childish retort, and POTUS has indeed tweeted his comeback.
De Niro has been vocal of his disapproval of the Trump administration.
"It's a disgrace. And I apologise to Justin Trudeau and the other people at the G7".