BUCKLEY v.VALEO 1 Per Curiam eralization drawn by the appellants, the practical impact of the contribution ceilings in any given election will clearly depend upon the amounts in excess of the ceilings that, for various reasons, the candidates in that election would otherwise have received and the utility of these additional amounts to the candidates. To be sure, the limitations may have a significant effect on particular challengers or incumbents, but the record provides no basis for predicting that such adventitious factors will invariably and invidiously benefit incumbents as a class.3" Since the danger of corruption and the appearance of corruption apply with equal force to challengers and to incumbents, Congress had ample justification for imposing the same fundraising constraints upon both. The charge of discrimination against minor-party and independent candidates is more troubling, but the record provides no basis for concluding that the Act invidiously disadvantages such candidates. As noted above, the Act on its face treats all candidates equally with regard to contribution limitations. And the restriction would appear to benefit minor-party and independent candidates relative to their major-party opponents because major-party candidates receive far more money in large contributions." Although there is some 3SAppellants contend that the Act discriminates against challengers, because, while it limits contributions to all candidates, the Government makes available other material resources to incumbents. See n. 33, supra. Yet, taking cognizance of the advantages and disadvantages of incumbency, there is little indication that the $1,000 contribution ceiling will consistently harm the prospects of challengers relative to incumbents. 39 Between September 1, 1973, and December 31, 1974, majorparty candidates for the House and Senate raised over $3,725,000 in contributions over and above $1,000 compared to $55,000 raised by minor-party candidates in amounts exceeding the $1,000 contribution limit.