OCTOBER TERM, 1961. Opinion of the Court. 369 U. S. "discrimination is sufficiently shown, the right -k relief under the equal protection clause is not diminished by the fact that the discrimination relates to political rights." Snowden v. Hughes, 321 U. S. 1, 11. To show why we reject the argument based on the Guaranty Clause, we must examine the authorities under it. But because there appears to be some uncertainty as to.why those cases did present political questions, and specifically as to whether this apportionment case is like those cases, we deem it necessary first to consider the contours of the "political question" doctrine. Our discussion, even at the price of 'extending this opinion, requires review of a number of political question cases, in order to expose the attributes of the doctrineattributes which, in various settings, diverge, combine, appear, and disappear in seeming disorderliness. Since that review is undertaken solely to demonstrate that neither singly nor collectively do these cases support a conclusion that this apportionment case is nonjusticiable, we of course do not explore their implications in other contexts. That review reveals that in the Guaranty Clause cases and in the other "political question" cases, it is the relationship between the judiciary and the coordinate branches of the Federal Government, and not the federal judiciary's relationship to the States, which gives rise to the "political question." We have said that "In determining whether a question falls within [the political question] category, the approriateness under our system of government of attributing finality to the action of the political departments and also the lack of satisfactory criteria for a judicial determination are dominant considerations." Coleman v. Miller, 307 U. S. 433, 454-455. The nonjusticiability of a political question is primarily a function of the separation of powers. Much confusion results from the capacity of the "political question" label to obscure the need for

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