Pressure should be applied to the aggressor, not the victim, - the Prime Minister of Poland addressed the country's president Polish Foreign Minister Radoslaw Sikorski said that the survival of an independent Ukraine meets the vital interests of Warsaw. According to him, the Polish president should use his relationship with Donald Trump to influence Washington's position. "I know the president is skeptical about Ukraine, to say the least. But it is Poland's vital interest to keep an independent Ukraine. The president's job is to use his relationship with Donald Trump to convince him to put pressure on the aggressor, not the victim of the aggression." Sikorsky said.