Why this is the most charged Ryder Cup in years: The impact of Donald Trump's visit, Rory McIlroy against his nemesis - and can Europe answer the big question in front of hostile US crowd?

RIATH AL-SAMARRAI AT BETHPAGE BLACK, NEW YORK: There were storms raging above the crowded tent when Rory McIlroy took his seat inside and presented a vision of calm on the eve of Ryder Cup.