Trump replied, "Well, we do have a lot of allies, but we can not be taken advantage of".
The host Olga Skabeeva opened the segment with footage of Trump and Melania getting on their Europe-bound plane together, holding hands.
Donald Trump speaks to media before leaving the White House for Europe.
Ankara has been disappointed with North Atlantic Treaty Organisation allies for not supporting Turkey's fight against terrorism and the lack of cooperation in meeting Turkey's defense needs.In addition, the Turkish president is expected to meet with European Council President Donald Tusk, European Commission President Jean-Claude Juncker and European Parliament President Antonio Tajani.Several members of Turkey's new Cabinet will reportedly accompany Erdoğan on his visit. The meeting, which will be held today and tomorrow at NATO's new headquarters building in Brussels, is Erdoğan's first global summit after taking office for a new five-year term as president.
Trump was referring to the controversial $12 billion proposed Nord Stream 2 pipeline between Russian Federation and Germany. That is why we have agreed today to strengthen EU-NATO ties in crucially important areas.
Trump has preferred to take aim at allies.
Baltic leaders fearful of any repeat of Russia's annexation of Crimea called for unity as they arrived at the summit, while Slovakia's President Andrej Kiska said his country was "one of the good guys" because he was increasing defence spending.
Trump alarmed allies during a visit to Brussels a year ago when he did not specifically mention U.S. backing for Article 5, but aides said later that United States support was assumed and did not have to be mentioned.
EU President Donald Tusk stepped up to the fight with his own salvo against Trump on Tuesday. Trump said as he unloaded on Stoltenberg.
Tusk also urged European NATO members to spend more on defense, but noted: "Money is important but generating solidarity is more important".
Woman Arrested in Iran for Posting Videos of Herself Dancing on Instagram
It was not known whether her public confession was made under duress or whether she was released as a result. In several videos , she chose to appear without wearing the obligatory headscarf.
"Billions and billions of dollars being paid to the country we are supposed to be protecting you against", Trump said to Stoltenberg. "Wow!" And in multiple tweets, he reiterated a familiar theme, complaining that the U.S. is shouldering an unfair share of defense costs overseas: "NATO countries must pay MORE, the United States must pay LESS", he tweeted.
European officials say while United States defence spending makes up 70 percent of combined allied governments' military budgets, just 15 percent of U.S. expenditure is spent in Europe on NATO-related defence.
"If you look at it, Germany is a captive of Russian Federation".
Trump took Twitter swipes at Canada following the G7 summit - mostly over Canadian dairy trade policy - but reserved his most persistent and personal attacks for Trudeau himself, calling him "dishonest" and "weak" for telling the closing G7 news conference that Canada would not be "pushed around" on trade.
"The United States continues to devote more resources to the defense of Europe when the Continent's economy, including Germany's, are doing well and security challenges abound".
European Council President Mr Tusk said pointedly that when Mr Trump did meet Mr Putin on 16 July, "it is always worth knowing who is your strategic friend and who is your strategic problem".
Germany's defense spending is now 1.24 percent of its GDP.
She added that "Trump is also bringing Putin a "little" present-why 'little, ' I don't know".
"NATO members must finally contribute their fair share and meet their financial obligations ..."