Answer:
1. new ideas around the government and basic life change
2. economy= democrats support move government spending instead of military spendings, while republicans see it the opposite way. Democrats also believe that people with more money should be paying higher taxes.
National security=republicans believe that they have a right to be secure in their home and want the government to pay more money for the U.S. security system. Democrats have a very similar view to the republicans though.
3. Some parties may secretly receive big fundings from support groups and parties/candidates can buy votes instead of winning them fairly
4. liberalism, conservatism, libertarianism and populism/half of them are seen as independent(moderate, libertarians) and half of them would prefer the government to a limit(liberal, conservative). They all have different views on the government and what they should do but they all
Explanation: