http://ag.senate.gov/site

The Senate Agriculture Committee has oversight over matters relating to: U.S. Department of Agriculture (USDA) activities including farm payments, crop insurance, conservation programs, and livestock marketing rules; the Rural Utilities Service and Rural Development, which carryout important programs relating to rural energy development, rural business financing, and rural health care services; Nutrition programs including the National School Lunch Program, the Women, Infants and Children program, and the Supplemental Nutrition Assistance Program (formally known as food stamps); and the Commodity Futures Trading Commission, which oversees all futures markets.

• Jobs, Rural Economic Growth, and Energy Innovation Subcommittee (Ranking Member)
  The Jobs, Rural Economic Growth, and Energy Innovation Subcommittee has legislative jurisdiction over rural economic revitalization and quality of life, rural job and business growth, rural electrification, telecommunications and utilities, renewable energy production and energy efficiency improvement on farms and ranches in rural communities, and innovation in the use of agricultural commodities and materials
• Livestock, Dairy, Poultry, Marketing and Agriculture Security Subcommittee

http://budget.senate.gov/republican/

The Senate Committee on the Budget is responsible for drafting Congress's annual budget plan and monitoring action on the budget for the Federal Government. In addition, the Budget Committee has jurisdiction over the operation of the Congressional Budget Office (CBO), and plays a major role ensuring bills considered by Congress meet the guidelines set by the budget.

http://commerce.senate.gov/public/

The Senate Committee on Commerce, Science, and Transportation has jurisdiction with matters relating to: Coast Guard; Communications; Highway safety; Inland waterways; Interstate commerce; Marine and ocean navigation safety and transportation; Marine fisheries; Merchant marine and navigation; Nonmilitary aeronautical and space sciences; Oceans weather and atmospheric activities; Regulation of consumer products and services; Regulation of interstate common carriers, including railroads, busses, trucks, vessels, pipelines, and civil aviation; Science, engineering, and technology research and development and policy; Sports, and Transportation.

• Aviation Operations, Safety, and Security Subcommittee (Ranking Member)
  The Subcommittee on Aviation Operations, Safety, and Security Subcommittee has jurisdiction over civil aviation, with specific oversight responsibility for the Federal Aviation Administration (FAA). The Subcommittee controls the authorization levels for all of the FAA’s programs. It monitors the agency’s grant making efforts in funding airport infrastructure projects and air traffic control (ATC) facility upgrades. The Subcommittee also has jurisdiction over oversight of the nation’s international infrastructure related to civil aviation as well as domestic aviation security and the majority of the Transportation Security Administration (TSA) workforce.  

• Communications, Technology, and the Internet Subcomittee
• Competitiveness, Innovation, and Export Promotion Subcomittee
• Consumer Protection, Product Safety, and Insurance Subcomittee
• Surface Transportation and Merchant Marine Infrastructure, Safety, and Security Subcomittee

http://finance.senate.gov/

The Senate Committee on Finance has jurisdiction with matters relating to: taxation and other revenue measures generally; bonded debt of the United States; customs, collection districts and ports of entry and delivery; reciprocal trade agreements; tariff and import quotas; the transportation of dutiable goods; deposit of public moneys; general revenue sharing; health programs under the Social Security Act, including Medicare, Medicaid, and other health and human services programs financed by a specific tax or trust fund; and Social Security.

• Energy, Natural Resources, and Infrastructure Subcommittee
• International Trade, Customs, and Global Competitiveness Subcommittee (Ranking Member)
  The Subcommittee on International Trade, Customs, and Global Competitiveness has jurisdiction over all taxation and revenue-generating measures that involve international trade, customs, and global competitiveness.
• Taxation and IRS Oversight Subcommittee