Supremacy clause was introduced in the new Jersey Plan. It was put up for motion by Luther Martin and was passed unanimously.
The supremacy clause is mentioned in the fourth article of the US constitution, It states that the federal laws are superior to all other laws in US. Federal law takes precedence over state laws and other state constitutions. It was upheld in cases such as Pennsylvania v. Nelson and McCullough v. Maryland.
As far as I know, the Supreme Court is the court of last resort. There is nowhere else to go to question its actions. The Supreme Court itself held that it “is a court of last resort, and must so remain if it is to satisfactorily perform the functions assigned to it by fundamental Charter and immemorial tradition.
