United States Foreign economic relations Medicare Foreign trade regulation Free trade Taxation Law and legislation Tax administration and procedure Appropriations and expenditures Income tax Law and legislation Rules and practice United States Commercial policy Medicare Law and legislation Social security Management Taxation Favored nation clause Medical care, Cost of Health insurance Law and legislation Budget Social security Law and legislation Health insurance Health care reform Tariff preferences Income tax Tax incentives Law and legislation Emigration and immigration law Public welfare Tariff Law and legislation Tax credits Law and legislation China Foreign economic relations United States