The Ideologies of American Politics history homework help

The Ideologies of American Politics Please respond to the following:

Based on the scenario and the knowledge gained from this section, address the following:
- Identify at least three effects on political ideologies that arise from the existence of only two major political parties in the U.S.
- How do THIRD parties affect the two major parties considering their role in the political primary process?
- How do the two major political parties compare in terms of actual outcomes of their policies, NOT their stated goals or policies?
- How have the two major parties changed over the course of the past several decades? (NOTE: The Live Lectures will help answer this part)