By Michel Rose PARIS (Reuters) – Now comes the hard part. Emmanuel Macron may have seen off far-right leader Marine Le Pen, but his second term could be even rockier than the first with mounting political opposition and boiling social discontent. As supporters savoured a hard-won victory at a rally by the Eiffel Tower on Sunday, his lieutenants were already going around TV studios and acknowledging that Le Pen’s unprecedentedly high score — as much as 42% according to estimates — meant Macron will have to draw lessons from it. “With the far-right at 40%, it shows we’ve got more work to do,” …