Complex sentence: So when the then Governor McCallister approached her about it, she at first turned down the offer and just assumed he'd move along, however McCallister's great power of persuasion eventually managed to convince her to become his running-mate.
Split into simpler sentences: So when the then Governor McCallister approached her about it, she at first turned down the offer and just assumed he'd move along. However, McCallister's great power of persuasion eventually managed to convince her to become his running-mate.