She also said the U.S. president wasn't entirely wrong in pressing Germany to increase defence spending.
"I have been Russia's worst nightmare", Trump claimed, "but with that being said, Russian Federation should be in this meeting".
French President Emmanuel Macron's thumb left a literal imprint on US President Donald Trump's hand at the G7 summit in Canada as they continued their tradition of intense handshakes. G7 chiefs have largely praised Trump for his efforts to stabilize the Korean peninsula, but they are unhappy he pulled out of an global agreement to limit Iran's nuclear ambitions.
President Trump seemed unconcerned about ruffling a few feathers Friday at the annual Group of Seven nations summit in Canada.
Concerned about Trump's approach to tariffs, Merkel on Friday proposed the creation of a "shared evaluation mechanism" on U.S. trade, a forum aimed at defusing tensions between the USA administration and the European Union.
Trump, for instance, is considering imposing tariffs on auto imports on national security grounds, a move that would hurt major foreign auto producers like Germany.
But when the time came to air their grievances in public, the leaders here mainly sounded resigned to the fact their differences with Trump may never be resolved.
The European leader-famed for negotiating compromise without political histrionics-gave an uncharacteristically candid and combative assessment of relations with Trump as she spoke to German channel ARD, after last week's G-7 summit. "The American President may not mind being isolated, but neither do we mind signing a 6 country agreement if need be", Macron wrote.
The flags of Germany, France and the European Union are seen in front of the the Chancellery, before the meeting between German Chancellor Angela Merkel and French President Emmanuel Macron in Berlin, Germany May 15, 2017.
President Donald Trump is taking more swipes at Canada and its prime minister over trade issues as he settles in for a summit with North Korea in Singapore.
To be fair, it's not exactly clear what is going on at the moment when the picture was snapped.
Macron said that recent trade actions taken by Trump are counterproductive to the economy of the United States.
The acrimonious fallout from the G7 began after Mr Trump watched Mr Trudeau's end-of-summit press conference.
Paris also delivered a withering response to the United States president's tweeted instruction for American officials to withhold their endorsement.
Although U.S. senators have warned that a spat risks launching a "trade war", the key factor behind Trump's apparent policy zigzag was a matter of his image ahead of a first ever meeting with North Korean leader Kim Jong Un this week, according to Trump's economic adviser Larry Kudlow.
She would also tell other leaders that rather than imposing tariffs on each other, pressure should be increased on China to reduce its excess steel capacity, the person said.