Trump is under pressure at home to take a tough line in his first face-to-face meeting with Russian President Vladimir Putin on issues such as Moscow's support for President Bashar al-Assad in Syria's civil war and allegations of Russian meddling in last year's US election.
Trump will stop first in Warsaw, Poland, to give a speech in Krasinski Square, near the site of the 1944 Warsaw Uprising against the Nazis.
US President Donald Trump will touch down in Warsaw on Wednesday evening to talk security and trade with his Polish counterpart Andrzej Duda and meet regional leaders before heading to Germany for a G20 summit.
President Donald Trump embarks for Europe Wednesday to visit a key North Atlantic Treaty Organisation ally and attend the G20 summit on the second foreign trip of his presidency. Trump could well raise North Korea with Putin, too, with evidence that Russian companies have been selling arms and oil to the rogue state.
That is not the only tough meeting for Trump during his trip.
The White House didn't respond to a request for comment on those reports.
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But the plaudits are unlikely to follow Trump from Poland to the G20, which brings together the leaders of the world's largest economies.
Foreign Policy magazine has reported that during Trump's visit, expected to last some 16 hours, Poland is likely to emphasize the threat posed by Russian Federation.
Trump may also seek to use Poland as an exemplar of partnership.
Establishment figures in his team, such as Defense Secretary James Mattis and National Security Adviser H.R. McMaster, have been far more clear than their boss in supporting NATO's allies across the pond. It's also a regular customer for USA military equipment.
The northern port city in Germany is also the setting for Trump's first in-person meeting Friday with Russian President Vladimir Putin, a closely watched session that has taken on greater significance given the swirl of controversy about Russia's cyber meddling in last year's election. "They're betting that this relationship with the United States on defense will balance their concerns about the possible directions of U.S. -Russia policy". Later that week, at the G7 in Italy, Trump felt outnumbered, according to people who traveled with him, and picked on when the other leaders insisted he maintain the USA commitment to the Paris climate accord.
"Poland is, in some ways, a poster child for some of the issues that the Trump administration has been stressing", said Jeffrey Rathke, deputy director of the Europe Program at the Center for Strategic and International Studies. The right-wing government is also one of only three European Union countries - along with Hungary and Austria - refusing to accept any relocated refugees, in legal violation of EU quotas.