"We urge Russian Federation to cease its destabilizing activities in Ukraine and elsewhere, and its support for hostile regimes - including Syria and Iran - and to instead join the community of responsible nations in our fight against common enemies and in defense of civilization itself", Trump said. USA intelligence officials say the unpredictable Russian Federation leader ordered interference into the 2016 election that brought Trump to the White House.
While Europe no longer faces the threat of communism, Trump said the West faces "dire threats". "Let's FIGHT FAKE NEWS".
Speaking in the Polish capital Warsaw on Thursday, Mr Trump urged Moscow to remove its support for hostile regimes including Syria and Iran.
The U.S. President said North Korea had behaved in a "very, very unsafe manner", and added: "I call on all nations to confront this global threat and publicly demonstrate to North Korea that there are consequences for their very, very bad behaviour".
The two men will meet in Germany on Friday on the sidelines of a G20 summit.
President Donald Trump delivered a speech to a large crowd Thursday in Poland's Krasinski Square, the site of the Warsaw Uprising against Nazi occupation. He referenced terror attacks across the world, vowing that "we will confront them and we will win".
In March Poland said it expected to sign a deal worth up to $7.6 billion with USA firm Raytheon to buy eight Patriot missile defence systems by the end of the year.
"We have never been closer to Poland, Poland is not only a great friend of the United States but a true ally and partner", Trump told a joint press conference with Polish President Andrzej Duda.
At the news conference, Trump praised Poland as "one of the few nations that meets its financial obligations" to North Atlantic Treaty Organisation, saying money was "pouring in" to the alliance since his complaint that some leaders were not spending enough on shared defense.
"What we want to see in the United States is honest, beautiful, free, but honest press".
Trump has this week expressed frustration that North Korea's neighbor China has not put more pressure on Pyongyang, notably through trade, to try to rein in its weapons program.
Patton Oswalt & Meredith Salenger Are Engaged!
He won an Emmy a year ago for his comedy special Patton Oswalt: Talking for Clapping. Patton's new girlfriend is a Harvard-educated psychologist who also acts.