Complex sentence: Ron believes everything will eventually go back to normal as it has with past city managers that implemented drastic changes, but Donna (Retta) is concerned that the overly-determined Chris will not do so and demands that Ron talk to him.
Split into simpler sentences: Ron believes everything will eventually go back to normal as it has with past city managers that implemented drastic changes. However, Donna (Retta) is concerned that the overly-determined Chris will not do so and demands that Ron talk to him.