Final answer:
The electoral commission created by Congress consisted of fifteen members, with representation from the Senate, the House, and the Supreme Court.
Step-by-step explanation:
The advisory commission being referred to in the question is the electoral commission that Congress decided to create. This commission was composed of five members from the Senate, five members from the House, and five members from the Supreme Court to determine which returns from Florida, Louisiana, and South Carolina to count during a particularly tumultuous election period. In total, the commission was made up of fifteen members. The composition was designed to include seven Democrats, seven Republicans, and one independent member to break any potential tie, although the expected independent member declined to serve, eventually leading to a Republican from the Supreme Court, Joseph Bradley, taking the final spot.