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COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko poses together with Queen Margrethe of Denmark at Amalienborg Palace during his state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko poses together with Queen Margrethe of Denmark at Amalienborg Palace during his state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko poses together with Queen Margrethe of Denmark at Amalienborg Palace during his state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko poses together with Queen Margrethe of Denmark at Amalienborg Palace during his state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

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COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko (R) poses together with Queen Margrethe of Denmark and Soren Pind, Miniser for Research and Education at Amalienborg Palace during the President's state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)

COPENHAGEN, DENMARK - APRIL 05: Ukrainian President Petro Poroshenko (R) poses together with Queen Margrethe of Denmark and Soren Pind, Miniser for Research and Education at Amalienborg Palace during the President's state visit to Denmark on April 5, 2017 in Copenhagen, Denmark. The President will also meet Prime Minister Lars Loekke Rasmussen where they will discuss the Russian - Ukrainian conflict and economic development in Ukraine.  (Photo by Ole Jensen - Corbis/Corbis via Getty Images)