Actually, gerrymandering does the opposite. The goal of gerrymandering for your party is as many seats as possible where you have a large but not super-massive

Actually, gerrymandering does the opposite. The goal of gerrymandering for your party is as many seats as possible where you have a large but not super-massive advantage. You'd rather have three 55-45 seats than a 65-35 and two 50-50s, whereas you try to stick your opponent with as many 70-30s as possible.