The correct answer to this open question is the following.
My argument is to support the policy of judicial review. I think the US Supreme Court has the ability to deem laws and executive actions unconstitutional because the US government has to have a neutral branch that can decide on difficult issues without any favoritism or bias.
The United States Congress has members of the two national parties: the Republican Party and the Democratic Party. Both political parties could have particular agendas or personal interests that can bias the nature of law and could distort a piece of legislation.
That is why it is so important that the judicial branch -the Supreme Court- can have the independence granted in the US constitution to freely decide when a law is unconstitutional.