The Senate doesn't have main branches in the way that the U.S. government does (Executive, Judicial, and Legislative). However, the Senate does have several powerful committees. Some of the main ones would be: Committee on Appropriations

The Senate's Committee on Appropriations is crucial because it decides how federal funds are allocated to various government programs and agencies. Essentially, it holds the purse strings for government spending. Members of this committee review budget proposals, negotiate funding levels, and ensure that taxpayer money is spent wisely. They play a vital role in shaping the federal budget, influencing everything from education and healthcare to national defense. Their decisions greatly impact the everyday lives of citizens, as they determine which services are funded and to what extent.