Question interpreting the constitution are decided by which branch of government?

The Judicial Branch, or the federal court system, interprets the law. The US Supreme Court, head of the Judicial Branch, is the ultimate authority on the interpretation of federal law and the constitutionality of any law.
Did you know there is a government of divine authority existing now that Jesus told us to pray for at Matthew 6:9,10. called "the Lords Prayer." The bible tells us that the government of the world will be replaced by God's Heavenly Government. Daniel 2:44.
This is what God's Kingdom will do very soon.
The Earth Transformed, An End to Poverty, No More Sickness, No More Death,Lasting Global Peace, Peace With the Animal Realm. The Dead Return
Life will not be boring or unproductive. Instead, as the Bible foretells, every day in Paradise will be an “exquisite delight.” (Psalm 37:11) Ahead of us is the beginning of a marvelous new era.
Over eight million people from the earth have embraced this hope by accepting the invitation for a free personal study bible study. There are no exams. You will learn What The Bible REALLY Teach. The hope God's Government promise is real and you can have a sure hope of being one of its subjects,
For more information on this subject and others, please go to jw.org "Online Library." Also for free downloads, publications or read online.