Mr. Hollande is entering spring presidential elections with record-low approval ratings, a sluggish economy and his nation in a skittish mood after a series of terrorist attacks. He is facing potential challenges even from within his own party, in addition to those from conservatives and the far right under Marine Le Pen.
More than a month on, little is clear. Britain’s trading relationship with the E.U. looks to be in limbo. Companies are reassessing their long-term investments in Britain. Here’s what’s happened so far.