Marine Le Pen’s far right, anti-immigrant National Front is doing a fine job of uniting France, notably almost all parties not the National Front.
Regarding Le Pen’s recent relative success in the first round of elections, the New York Times writes:
But that remarkable accomplishment is so alarming to so many in France that as soon as the preliminary results were announced at 8:01 p.m., virtually all of her major opponents in the 11-person race called for her defeat in the second-round runoff on May 7. They implored their supporters to vote for the candidate projected to come out on top on Sunday, the centrist, pro-European Union former economy minister Emmanuel Macron, a political novice and outsider.
The enemy of my enemy, etc., etc.