Even if you walk exactly the same route each time - as with a sonnet - the events along the route cannot be imagined to be the same from day to day, as the poet's health, sight, his anticipations, moods, fears, thoughts cannot be the same.
The difference today is that, in both parties, the very extreme elements control the nomination process.
Although, this is often used with negative connotations, I see ideology as an inherent part of culture.