WASHINGTON — With Iran and a list of other tough issues awaiting them, President Donald Trump and France’s Emmanuel Macron are starting off the French president’s three-day visit with an anything-but-ordinary double date with their wives at George Washington’s house. The presidents and their spouses will get together for a private dinner at Mount Vernon, Washington’s historic riverside home, one night before the two leaders sit down for talks on matters including security, trade and the Iran nuclear deal. Trump has been itching to pull out of the multinational nuclear agreement as a May 12 deadline nears.