original question: what amendment did [United States congressional committee] propose?
answer: fifteenth amendment to the united states constitution
answer type: Constitutional Amendment.
auxiliary information: A congressional committee is a legislative sub-organization in the United States Congress that handles a specific duty. Committee membership enables members to develop specialized knowledge of the matters under their jurisdiction. As "little legislatures", the committees monitor ongoing governmental operations, identify issues suitable for legislative review, gather and evaluate information, and recommend courses of action to their parent body. Woodrow Wilson once said, "it is not far from the truth to say that Congress in session is Congress on public exhibition, whilst Congress in its committee rooms is Congress at work." It is neither expected nor possible that a member of Congress be an expert on all matters and subject areas that come before Congress. Congressional committees provide invaluable informational services to Congress by investigating and reporting about specialized subjects. Congress divides its legislative, oversight, and internal administrative tasks among approximately 200 committees and subcommittees.
The [United States congressional committee]  proposed what constitutional amendment?