We know through painful experience that freedom is never voluntarily given by the oppressor; it must be demanded by the oppressed.
how does king support this claim?
by describing his own experience with waiting for civil rights
by providing quotes from militant civil rights demonstrators
by explaining the racist attitudes of white politicians
by recalling a dream of his in which all people were equal

From the statement above, King support the claim that: by describing his own experience with waiting for civil rights

from this line:

. . .painful experience that freedom is never voluntarily given by the oppressor . .

We can infer that king believe that the freedom toward a discrimination or unlawful treatment would not given by the oppressor without any effort. This become the reason why King led a non-violent protest to demand for equal treatment for racial minorities. His movement led to the creation of the civil right act of 1964.

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.