In an uproarious trip to Europe, Trump harangued members of the North Atlantic Treaty Organisation military alliance, scolded Germany for its dependence on Russian energy and shocked Britain by publicly criticising Prime Minister Theresa May's Brexit strategy.
"Donald Trump must immediately cancel his planned summit with Vladimir Putin until Russian Federation demonstrates its willingness to come back into the community of nations that respect the rule of law, legal norms and democratic institutions", Duckworth said. "It's a devastating technology". He called "admiration" Trump has shown for Putin "unconscionable".
Top Democrats have urged Trump to cancel the planned summit altogether following the indictment.
The US has passed a series of sanctions against Russian Federation since 2014 over its annexation of Crimea from Ukraine and alleged meddling in the US elections, which it denies.
"We go into that meeting not looking for so much", he told reporters at a news conference following a North Atlantic Treaty Organisation summit in Brussels.
Trump's remarks about Merkel drew a rare, pointed rebuke from the chancellor, whose relationship with Trump has been strained from the start, as well as from the House and Senate Democratic leaders, Nancy Pelosi and Chuck Schumer.
Daniel Fried, a former assistant secretary of state for European and Eurasian affairs, said he was anxious that Putin would outmaneuver Trump on the matter. Greenpeace, in a statement, claimed the protest forced the president to take cover, saying "as the glider appears overhead, the president can be seen making for the entrance, breaking into a trot".
"I have experienced myself how a part of Germany was controlled by the Soviet Union", Merkel told reporters Wednesday having just arrived for the North Atlantic Treaty Organisation summit in Brussels.
Of their hostility, he told BBC television: "I don't think that reflects the genuine good manners and hospitality of the British people".
They had been told by the White House not to expect access to the president on Saturday.
"I don't think anything gets the message across to Trump, but I hope demonstrations like these encourage people in the States to fight the Trump regime", said Eli Roth, a 56-year-old from California who is living in Edinburgh.
Trump raised the meddling issue during his first meeting with Putin on the sidelines of the G20 summit in Hamburg past year.
According to him, Trump has gained some freedom in recent months: "He managed to make changes to his team, get rid of opponents and find supporters, managed to deal with pressure put by the democrats, even though they tried to get rid of him just six months ago". "So I wouldn't underplay at all the importance of actually sitting down for the first time in a meeting-summit environment and discussing the issues that really matter most".