Of the events from the Tea Party, to the repeal of DOMA, and the passage of ACA, which event do you believe created the greatest shift in social attitudes in America? Explain your reasoning.

federal power is further limited with a system of checks and balances that gives each branch of government a measure of power over the others.

explanation:

d) he bring down boss tweed and tammany hall.

b) the confederacy had to pay all union war expenses.