A key role of political party that is out of power is to

Val dimer Orlando Key Jr. was a political scientist of American origin, who gave the political theory and studied politics closely identified or specified many roles and responsibility.

Of all those, most important part which is accessible to the public which pertains to involvement of public is the independent voting system, as listed under option 2.

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Explanation:

harry byrd declared organized resistance by southern states would prevent racial integration.