Jack Schlossberg has ripped Ryan Murphy’s depiction of his late uncle as “grotesque” and “stupid.” But in a twist, the popularity of Love Story may be a primary factor in the Kennedy scion’s sudden political ascendance. This midterm season, there is a wide open congressional seat in the heart of Manhattan. Stretching from Union Square through Central Park, New York 12 is home to more Fortune 500 companies, millionaires and cultural landmarks tha…