Larry Tribe Proposes a Constitutional Amendment to Fix Campaign Finance

As part of Slate's series of guest columns on fixing the Constitution, Larry Tribe has proposed the following constitutional amendment to deal with  campaign finance problems:

Nothing in this Constitution shall be construed to forbid Congress or the states from imposing content-neutral limitations on private campaign contributions or independent political campaign expenditures. Nor shall this Constitution prevent Congress or the states from enacting systems of public campaign financing, including those designed to restrict the influence of private wealth by offsetting campaign spending or independent expenditures with increased public funding.

In his column about the proposed amendment, Tribe writes that the rise of super PACs has less to do with the decision in Citizens United than the 1976 decision in Buckley v. Valeo.