Donald Trump arrived in Quebec on Friday, begrudgingly. The U.S. president reportedly asked aides: why should he bother going to the G7 Summit in Canada? Trump has been at odds over trade - quite publicly -- with the other leaders from the group of industrialized nations. This year's meeting comes just days after the Trump administration slapped import duties on steel and aluminum from its long-time allies, including the summit host country. G7 Finance ministers, meeting last weekend, already rebuked the U.S. president. And the other six nations promised a unified front against Trump's "America First" policies. Canadian Prime Minister Justin Trudeau -- meeting Trump, just hours after the U.S. president publicly criticized him -- tried to put on a friendly face.

JUSTIN TRUDEAU CANADIAN PRIME MINISTER "We both got elected on a commitment to growth of the middle class and helping those working hard to join it, and that's what we're going to stay focused on."

DONALD TRUMP US PRESIDENT "Our relationship is very good. We are actually working on cutting tariffs and making it fair for both countries."

Before leaving Washington, Trump suggested, the U.S. is the victim.

DONALD TRUMP US PRESIDENT "We have massive trade deficit with almost every country. We will straighten that out and I'll tell you what, it's what I do. It won't even be hard. And in the end we'll all get along."

But differences - on topics including climate change - were on display.

ANGELA MERKEL GERMAN CHANCELLOR "I would say it's more honest to name the differing views and try to overcome them than to pretend that everything is in order."

Trump also suggested that Russia should have a place in the group, again. It was kicked out in 2014, in response to what Western nations called its illegal annexation of Crimea from Ukraine. The new Italian Prime Minister supported the idea, while a spokesman for the Canadian foreign minister said: Ottawa's position remained unchanged. And this, from the European Council President.

DONALD TUSK PRESIDENT, EUROPEAN COUNCIL "I feel there is a lot of speculation about G6 plus one or G7 minus one or G7 plus one, but let's leave 7 as it is. It's a lucky number."

A spokesman for the Kremlin said: no thanks, Russia has other priorities.