Facing pointed criticism from increasingly disillusioned allies, he punched back, uncowed by the growing global outcry.
China is mired in tough negotiations with the United States to avoid a trade war, while Moscow has deep differences with Washington on multiple diplomatic fronts, including Syria and Ukraine. But he downplayed the tension, saying, "When it all straightens out, we'll all be in love again".
Before leaving for the Group of Seven Summit in Quebec this morning, Trump mused to reporters in Washington that it was time to re-admit Russian Federation.
"President Putin and I both think that the China-Russia comprehensive strategic partnership is mature, firm and stable", Xi told reporters after their meeting.
In 2014 Russian Federation was booted from the G7 for annexing Crimea and invading Ukraine.
Trump's presidency has been clouded by a federal investigation into Russian meddling into the 2016 presidential election, and possible collusion by Trump's campaign.
Trump was reacting to Canadian Prime Minister Justin Trudeau, who said Saturday that Canada would retaliate for Trump's proposed new tariffs.
Mr Trump was already at odds with the rest of the group - the UK, Canada, France, Germany, Italy and Japan - over the imposition of tariffs on steel and aluminium.
It was revealed on the 12th of June that North Korean leader Kim Jong Un had sent a telegram to the Kremlin to commemorate Russia Day and congratulate President Vladimir Putin upon his successful rule over Russia for so many years. He says gender equality must "cut through" everything the G-7 does.
Trump's comments on agriculture, his imposition of steel and aluminum tariffs, as well as broader disagreements on trade, climate change and the US withdrawal from the Iran nuclear agreement, are setting the stage for some tense G7 talks once Trump arrives at the summit in the Quebec town of La Malbaie.
On Sunday, Trump's chief economic adviser, Larry Kudlow, accused Trudeau of undermining the United States and its allies with comments at the G7 summit.
European Council President Donald Tusk, who will attend the meeting of EU leaders, said in the New York Times this week "Europe must now do everything in its power to protect the trans-Atlantic bond, in spite of today's mood. At previous meetings this has been done in a number of ways, such as a chairman's statement". Trump's instructions to prepare a new set of sanctions targeting specifically Russia's INF non-compliance may actually help to focus political attention on breaking this deadlock (Vedomosti, May 17).
Asked about Trump's tariffs in March, Spain's Economy Minister Roman Escolano said that most countries at the summit shared the "belief that protectionism is a huge historical mistake".
That comment has Trump squarely offside with this fellow G7 leaders, including Canada, who view Russia's annexation of Ukraine's Crimean Peninsula and its meddling in western elections as a major worldwide security concern.
In April, the White House confirmed the two leaders spoke in a phone call about meeting at the White House "in the 'not-too-distant-future'".
"I agree with him", he said.
"We are looking for peace in the world, we are not looking to play games".
Trump did not appear enthusiastic about the summit, complaining to aides about having to attend, particularly with his Singapore sit-down with Kim right around the corner.
In his remarks to reporters on the White House lawn before departing for Canada Friday morning, Trump touched on a wide range of topics.
"Our position has not changed", said Adam Austen, a spokesman for Foreign Affairs. "In the interest of all". "It's a lucky number".
In his meeting with Putin, Rouhani said a "more serious and important" dialogue between Russian Federation and Iran was needed regarding the nuclear deal following Washington's "illegal" withdrawal from the pact, according to a Kremlin transcript.