In federalism, the sovereignty is divided between a central government and constituent units. The power is divided into three types; exclusive Federal powers, exclusive State powers and concurrent powers. Exclusive powers are those which are reserved for either federal or state governments. While concurrent powers are shared by both federal and state governments. Issuing licenses, Regulating interstate business, conducting elections, establishing local governments, ratifying amendments to the constitution, Taking measures for public safety are exclusive state power. while printing money, regulating interstate and international trade, declaring war, making treaties and foreign policies, maintaining army and navy are Federal powers.
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.</span>
Because it's always only been about these 2 parties. Republican and democrat. The third parties are just there... they never ever get enough votes to win, electoral or popular vote.
