How can our system of federalism lead to conflict between the states and federal government

Which of the following were lyndon johnson's goals as president?

Which statement describes the impact of the 21st amendment?

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.