A joint resolution proposing an amendment to the Constitution of the United States to require that the Supreme Court of the United States be composed of nine justices.

This joint resolution would propose an amendment to the U.S. Constitution that would require the Supreme Court to have exactly nine justices. If enacted, this amendment would need to be ratified by three-fourths of the states to become part of the Constitution. Currently, the number of Supreme Court justices is set by federal law rather than the Constitution, which means Congress could theoretically change it. This proposal would make nine justices a constitutional requirement that could only be changed through another constitutional amendment.

The practical effect of this amendment, if ratified, would be to prevent future changes to the size of the Supreme Court without going through the difficult constitutional amendment process. This is currently in the early stages of the legislative process, having just been introduced in the Senate. The amendment would need to pass both chambers of Congress with a two-thirds majority before being sent to the states for ratification.