Incumbents have an incentive to restrict the ability of challengers to raise money, and also to prevent independent groups to spend money criticizing the incumbents. Repeatedly legislators have passed limitations on campaign spending, but some of those restrictions have been declared unconstitutional under the [[Free Speech Clause]] of the Constitution.<ref>''Buckley v. Valeo'' (1976).</ref> | Incumbents have an incentive to restrict the ability of challengers to raise money, and also to prevent independent groups to spend money criticizing the incumbents. Repeatedly legislators have passed limitations on campaign spending, but some of those restrictions have been declared unconstitutional under the [[Free Speech Clause]] of the Constitution.<ref>''Buckley v. Valeo'' (1976).</ref> |