US and Russian leaders are set to meet in a summit at its planning stages for the first since the 2016 US election.
The summit, which is likely to take place in a mutually convenient third country, is set to become a grievance to US allies and NATO member nations, who would like to see Russian influence contained.
Foreign and domestic critics are questioning President Trump's commitment to NATO and fret over his desire to rebuild relations with Moscow as Washington tightens sanctions.