Trump's second biggest conversation of the day was with German Chancellor Angela Merkel, who Trump has alternately accused of "ruining Germany" and called his favorite world leader, NBC News reports.
A day ahead of Trump's weekend call with Russian President Vladimir Putin, the fight within the Republican Party over the direction of US policy toward Moscow intensified.
German Chancellor Angela Merkel attends a reception of German carnival societies at the Chancellery in Berlin, Germany. Trump also spoke with Prime Minister Narendra Modi.
Trump also spoke with Russian President Vladimir Putin and French President Francois Hollande, whose office said he warned the us leader about the economic and political consequences of protectionism.
Trump, however, has floated the idea of lifting penalties imposed over Russia's seizure of Crimea in exchange for a nuclear weapons pact or help fighting terrorist groups like Islamic State. "And nobody knows where they come from".
He also said the European Union imposed unfair environmental standards that prevented developers from building in Europe.
On NATO, both agreed on the "fundamental importance that the NATO alliance has for trans-Atlantic relations" and the need for all members to pay their fair share.
Trump has voiced strong criticism of North Atlantic Treaty Organisation during his campaign, raising questions about the money the United States pours into the alliance and saying that the U.S. "The leaders agreed on the need to strengthen already robust cooperation in the fight against terrorism and violent extremism".