French President Emmanuel Macron on Monday kicked off a pomp-filled three-day state visit to the US at the White House — a test of whether his studied bonhomie with President Donald Trump can save the Iran nuclear deal and avoid a trans-Atlantic trade war.

Before getting the full red carpet treatment at the White House — payback for wooing Trump with military parades and a dazzling Eiffel Tower dinner in Paris last July — Macron took an impromptu stroll to the Lincoln Memorial with his wife Brigitte.

Hailing the “very important” visit, Macron then rolled into the West Wing from Lafayette Square — named after the storied French general who fought in America’s war for independence — beneath dozens of fluttering tricolor French flags and before a full US military color guard.