French President Emmanuel Macron (left) shakes hands with President Trump, next to first lady Melania Trump, during the annual Bastille Day military parade in Paris on July 14, 2017. Trump is hosting Macron in Washington this week for the first official state visit of his presidency.

While President Trump and French President Emmanuel Macron share personal chemistry, their bond may be tested on issues such as strategy in Syria, the Iran nuclear deal and trade