With a week to go before the first round of France's presidential election, Anne Hidalgo is languishing at under 2 percent in the polls. If those voter surveys bear out at the ballot box on April 10, the performance would mark a historic low for the embattled Socialist Party. And so a distinct sense of foreboding reigned as supporters gathered Sunday for Hidalgo's rally in Paris, where she remains mayor, with the party already poised for a post-election ideological reckoning.