French President Emmanuel Macron gestures as he arrives to address a joint meeting of Congress on Wednesday, April 25, 2018, in Washington. President Donald Trump is hosting Macron for a state visit -- the first of his presidency. Pablo Martinez Monsivais/AP

Macron's wife, Brigitte Macron, visits the Duke Ellington School of the Arts in Washington on April 25. MANDEL NGAN/AFP/Getty Images

Trump toasts Macron during a state dinner to honor Macron on April 24, at the White House in Washington. Susan Walsh/AP

Trump and first lady Melania Trump arrive for a state dinner with Macron and his wife, Brigitte Macron, at the White House. LUDOVIC MARIN/AFP/Getty Images

Trump and the first lady wait to greet the Macrons as they arrive for the state dinner. Andrew Harnik/AP

Macron lays a wreath at the Tomb of the Unknown Soldier on April 24, at Arlington National Cemetery in Virginia. JIM LO SCALZO/EPA

Trump jokingly brushes what he described as dandruff from Macron's shoulder on April 24, in the Oval Office. BRENDAN SMIALOWSKI/AFP/Getty Images

Trump and Macron hold hands, as they walk to the Oval Office. The two leaders planned to tackle a slew of pressing policy issues, including the Iran deal, the Syrian civil war and Russian aggression. Pablo Martinez/AP

The two Presidents sit with their staff members on April 24, in the White House Cabinet Room. Pablo Martinez/AP

First ladies Melania Trump, right, and Brigitte Macron, second from right, tour the National Gallery of Art on April 24. Jacquelyn Martin/AP

The Trumps and the Macrons wave from the balcony of the White House during an arrival ceremony on April 24. Carolyn Kaster/AP

The ceremony was held on the South Lawn of the White House. Carolyn Kaster/AP

The Presidents put forward an elaborate show of friendship on the South Lawn, reviewing cordons of troops and recalling the long history between the United States and France. LUDOVIC MARIN/AFP/Getty Images

Macron's visit comes a little less than a year after the Trumps visited Paris for Bastille Day celebrations. Pablo Martinez/AP

The Trumps welcome the Macrons. Chip Somodevilla/Getty Images

Standing markers are set up for both Presidents before the arrival ceremony. BRENDAN SMIALOWSKI/AFP/Getty Images

Macron has forged one of the closest relationships Trump maintains with any world leader. SHAWN THEW/EPA-EFE

The Macrons flew into the United States on Monday, April 23. They had a private dinner with the Trumps at Mount Vernon, the estate of George Washington in Virginia. Andrew Harrer/dpa/picture-alliance via AP

The foursome uses golden shovels to plant a European Sessile oak tree on April 23, on the South Lawn of the White House. The tree was taken from Belleau Wood, northeast of Paris, where 9,000 American troops lost their lives during World War I. JIM WATSON/AFP/Getty Images

The Trumps and the Macrons leave the White House Oval Office on April 23. BRENDAN SMIALOWSKI/AFP/Getty Images

The couples walk on the White House's South Lawn. BRENDAN SMIALOWSKI/AFP/Getty Images

ABC News reporter Peter Alexander watches Macron's arrival on a phone while waiting for the White House press briefing to begin on April 23. Chip Somodevilla/Getty Images