<sod >For weeks, centrist former banker Macron and National Front (FN) leader Marine Le Pen have been out in front but opinion polls now show there is a chance that any of the four leading candidates could reach the second-round runoff on May< eod>< sod > For weeks, centrist former banker Le Pen has been out in front but opinion polls now show there is a chance that any of the four leading candidates could reach the second-round runoff on May< eod>