The limits restrict constitutionally-protected liberty.

The Cato Institute writes: “…restricting the liberty to engage in election campaigns because such engagement somehow injures the political system is fundamentally contrary to the constitutional structure of rights and powers. As James Madison said, “it could not be less folly to abolish liberty, which is essential to political life, because it nourishes faction, than it would be to wish the annihilation of air, which is essential to animal life, because it imparts to fire its destructive agency.” The Federalist No. 10, at 51-52 (James Madison) (Garry Wills ed., 2003). And as this Court recently held, “[i]f the First Amendment has any force, it prohibits Congress from fining or jailing citizens, or associations of citizens, for simply engaging in political speech.” Citizens United v. FEC, 558 U.S. 310, 313 (2010). Since monetary contributions to parties and campaigns are a form of political speech, they too are protected by the First Amendment.”  Read more about this argument here…