Why do supreme court justices serve for life? how does the court check on the other branches of the government?

Unlike in many countries, the judges of the US Supreme Court serve for a lifetime. There is no retirement age for judges and they can hold their office as long as they do not get impeached by the congress.

Explanation:

The judges are given this privilege to ensure that they are free from political pressure and act strictly according to the law without favouring unjust causes.

The Supreme Court checks the power of other branches of government using the system of judicial review. If the presidential actions or decisions do not abide by the constitution the courts can declare them unconstitutional.

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