New York (CNN) US President Donald Trump was "ranting and venting on trade" to French President Emmanuel Macron during their bilateral meeting Monday evening, according to a senior diplomatic source.

Trump lambasted the European Union for its trade policies, saying it was worse than China -- a complaint that the US president made to his French counterpart in an April meeting at the White House.

The source described Trump as "going off" on EU trade during his meeting on the sidelines of the United Nations General Assembly. Trump said that the EU had to open up on agriculture -- a continued point of contention in trade negotiations between the two entities. Macron was respectful to Trump and pushed back some on the topic but moved the conversation forward, the source said.

There was "some rapport" between the two, "but it's not what it (once) was," the source said.

Trump and Macron also talked about Iran and North Korea, during which Trump expressed his views in what the source described as "very predictable terms."

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