French centrists' feuding increases odds of Le Pen-Melenchon runoff

• Infighting among centrist candidates has split the mainstream vote in France's presidential race.
• Marine Le Pen, of the far-right, has widened her poll lead.
• Jean-Luc Melenchon, of the hard-left, is closing in on a run-off spot.
• The latest poll predicts a far-right vs far-left run-off for the 2027 French presidential election.
• Former French PM Philippe's support has fallen to 15% in recent polls.