Complex sentence: O'Rourke is considered an unconventional politicians in part because of his band activities but also his interest in English literature as reflected in the influence that he claims such authors as Leo Tolstoy, Ivan Turgenev, and James Joyce have had on his world-view.
Split into simpler sentences: O'Rourke is considered an unconventional politicians in part because of his band activities. His interest in English literature is reflected in the influence that he claims such authors as Leo Tolstoy, Ivan Turgenev, and James Joyce have had on his world-view.