Cite as: 572 U. S. ____ (2014) 15 Opinion of ROBERTS, C. J. tial amounts of money in order to communicate [his] political ideas through sophisticated” means. National Conservative Political Action Comm., 470 U. S., at 493. Either way, he is participating in an electoral debate that we have recognized is “integral to the operation of the system of government established by our Constitution.” Buckley, supra, at 14. Buckley acknowledged that aggregate limits at least diminish an individual’s right of political association. As the Court explained, the “overall $25,000 ceiling does impose an ultimate restriction upon the number of candidates and committees with which an individual may associate himself by means of financial support.” 424 U. S., at 38. But the Court characterized that restriction as a “quite modest restraint upon protected political activity.” Ibid. We cannot agree with that characterization. An aggregate limit on how many candidates and committees an individual may support through contributions is not a “modest restraint” at all. The Government may no more restrict how many candidates or causes a donor may support than it may tell a newspaper how many candidates it may endorse. To put it in the simplest terms, the aggregate limits prohibit an individual from fully contributing to the primary and general election campaigns of ten or more candidates, even if all contributions fall within the base limits Congress views as adequate to protect against corruption. The individual may give up to $5,200 each to nine candidates, but the aggregate limits constitute an outright ban on further contributions to any other candidate (beyond the additional $1,800 that may be spent before reaching the $48,600 aggregate limit). At that point, the limits deny the individual all ability to exercise his expressive and associational rights by contributing to someone who will advocate for his policy preferences. A donor must limit the number of candidates he supports, and may have

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