President Donald Trump is always eager to insult his perceived rivals, often with degrading nicknames, indiscriminate of party.

These past few days in London at a NATO summit were no different. He called House Intelligence Committee Chairman Adam Schiff (D-CA), who isn't present at the summit, a "a maniac," "a deranged human being," and "a very sick man" who "lies."

Trump is proving once again, however, that he can't take what he dishes out.

Video leaked of Canadian Prime Minister Justin Trudeau speaking to British Prime Minister Boris Johnson, French President Emmanuel Macron, and Dutch Prime Minister Mark Rutte apparently gossiping about Trump's tense press conference with Macron.

Watch below.

Though much of the video is inaudible, Trudeau noted Trump's rambling press conference with Macron and recalled watching "his team's jaws just drop to the floor." The latter comment was, according to Trudeau, about Trump's sudden announcement that the 2020 G7 summit would be held at Camp David.

No personal insults to Trump were said on the video, but the President was reportedly furious.

He responded by calling Trudeau "two-faced."

After an awkward silence, Trump clarified that he thinks Trudeau is a "nice guy," but isn't paying in enough to NATO.

Then, the President—whose son wrote a book about how Liberals are too sensitive—cancelled a concluding press conference and decided to return to Washington.

Some think Trump is being too sensitive.

Others thought that Trump's reaction was illustrative of a greater threat to the Republic.

At the end of his press conference with German Chancellor Angela Merkel, Trump was heard on a hot mic saying, "That was funny when I called that guy two-faced."

Yeah, these three years have been a real laugh riot.