PARIS — As Jordan Bardella edges closer to possibly replacing Marine Le Pen as France’s far-right presidential candidate, he is taking aim at one of her key economic promises. Le Pen has made the preservation of France’s generous pension system a major campaign issue, pledging to roll back President Emmanuel Macron’s reforms and keep the country’s legal retirement age at 62. Bardella has suggested that policy should be up for debate. Officials close to Bardella are now studying a plan to scrap