The main storylines as Trump returns to Europe

President Trump left behind a humid and soggy Washington on Wednesday for his second official visit to Europe. He landed in Poland on Wednesday night for a brief tour ahead of the main item on his agenda: the Group of 20 summit in Hamburg. There, Trump is expected to meet with Russian President Vladimir Putin face-to-face for the first time.

From most accounts, Trump’s time at a NATO meeting in Brussels and the Group of Seven summit in Sicily in May did not go well. It was marked by awkward public exchanges with his European counterparts and barbed comments in private. The following week, apparently angered by French President Emmanuel Macron’s gloating commentsabout a white-knuckle handshake with the U.S. president, Trump decided to thumb his nose at Europe and pull the United States out of the Paris climate…