Washington (CNN) President Donald Trump on Friday kept up his attacks on US allies ahead of his trip to the Group of Seven summit in remote Quebec.

"Looking forward to straightening out unfair Trade Deals with the G-7 countries," Trump wrote on Twitter early Friday morning. "If it doesn't happen, we come out even better!"

Looking forward to straightening out unfair Trade Deals with the G-7 countries. If it doesn't happen, we come out even better! — Donald J. Trump (@realDonaldTrump) June 8, 2018

In a separate post, Trump said the host country Canada "charges the U.S. a 270% tariff on Dairy Products! They didn't tell you that, did they? Not fair to our farmers!" (Canada charges an average tariff of 249% on imported dairy products, according to the World Trade Organization , and as much as 270% on some milk substances.)

On Thursday, Trump traded barbs with French President Emmanuel Macron after Macron suggested that the G7 nations would band together without the US. On Twittter, Trump also called Canadian Prime Minister Justin Trudeau "indignant" for his country's trade practices.

The summit comes amid a fractured moment for US alliances after the tariffs the US imposed last week on Canada, Mexico and the European Union. France and other US allies have also bristled at Trump's decision to withdraw from the Paris climate agreement.

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