Taken over by Protestants--Calvert allowed Protestants into the colony eventually leading to a take over.
Calvert wanted a Catholic state but also allowed Protestants access with religious toleration as the colonial rule. However, so many Protestants came to the colony eventually outnumbering the Catholics. As Protestants gained numbers they also gained power and control. They instituted laws against Catholics and they became target of violence and discrimination.
so that they would have more power in the government through representation (less slaves=anti-slavery state, and more power for the North against the South)