MSNBC host Joe Scarborough said Monday that his "worst expectations" of President Trump were met over the weekend at the Group of Seven (G-7) summit after the president urged U.S. allies to clear away trade barriers that he argues create huge trade deficits for the U.S.

"This weekend, certainly if you care about America's place in the world, had to be one of the most concerning, certainly, and I'll just say the most depressing, in Donald Trump's year and a half in office," Scarborough said on "Morning Joe" while introducing James Stavridis, chief international security and diplomacy analyst for NBC News and MSNBC.

"I must say that at least for me my worst expectations were actually met this weekend at the G-7 meetings," added Scarborough, a former GOP-congressman-turned-independent who has been a vocal critic of Trump. "What's the impact on America and the world?"

"I share your concern. And, you know, if you're getting ready in a schoolyard to face a bully, which is Kim Jong Un, you would think you would want to kind of gather your friends around you," Stavridis replied. "Here was a perfect setup. Walk into a summit meeting with the largest economies in the world, all U.S. allies."

"Why not come out of that with a strong sense of community to go face this awful dictator in Singapore?" he asked. "So it fails the pragmatic test ... And I'll tell you, when you so aggressively go after the European allies, you drive them away from us. To do it right now, at this moment, is just bad geopolitics."

Trump continued to blast Canadian Prime Minister Justin Trudeau and Canada's trade policies in a series of tweets after arriving in Singapore for his summit with North Korea's Kim Jong Un on Tuesday.

The president claimed that Trudeau, who hosted the G-7 summit of leading industrialized nations over the weekend, "acts hurt when called out" while declaring that the U.S. "cannot let our friends, or enemies, take advantage of us."

White House senior economic adviser Larry Kudlow and the administration's top trade adviser, Peter Navarro, also slammed the Canadian prime minister on Sunday, with Navarro calling Trudeau's comments "one of the worst political miscalculations of a Canadian leader" in modern history.

"There's a special place in hell for any foreign leader that engages in bad faith diplomacy with President Donald J. Trump and then tries to stab him in the back on the way out the door," Navarro stated.

"That was one of the worst political miscalculations of a Canadian leader in modern Canadian history," he added.

Canada responded by announcing it would put into effect countermeasures to combat U.S. tariffs.