Iran's foreign minister Zarif on NBC. Photo: Screenshot.

LAUSANNE, Switzerland—France is again adopting the toughest line against Iran in negotiations aimed at curbing Tehran’s nuclear program, potentially placing Paris at odds with the Obama administration as a diplomatic deadline to forge an agreement approaches at month-end.

President Barack Obama called French President François Hollande on Friday to discuss the Iran diplomacy and try to unify their positions. The presidents “reaffirmed their commitment” to a deal “while noting that Iran must take steps to resolve several remaining issues,” the White House said.

Read full story at The Wall Street Journal.