Complex sentence: After retiring Morton's impact was felt as an administrator becoming a powerful figure within Scottish sport and, further a-field, demonstrated an inclination toward Unionist politics in reaction to the rise in post-War Scottish nationalism.
Split into simpler sentences: After retiring Morton's impact was felt as an administrator, becoming a powerful figure within Scottish sport. Further afield, he demonstrated an inclination toward Unionist politics in reaction to the rise in post-War Scottish nationalism.