The legislative arm of the federal government of the United States is divided into two, the first one is the Senate also known as the upper house and the house of representatives also known as the lower house. The Senate is saddled with the constitutional responsibilities almost very similar to the house of representatives. The Senate is constitutionally empowered to do things that cover issues relating to the organization and functioning of the federal system.
They are also saddled with the responsibility of passing bills that would eventually be laws guiding the country. The laws to be made have to do with the status, powers, institutions and funding of the federated entities, the laws governing intra-federal cooperation, conflicts of competence, conflicts of interest, as well as the exercise of the right to substitution, the laws in respect of the constitution of the land. Part of their works is to screen anybody appointed by the president.