I think Mr. Sowell makes a great point. Incumbents already receive free publicity and coverage by the mainstream media - especially the leftist incumbents. Limiting campaign contributions only helps leftwing incumbents and sets up barriers to those trying to vote out an incumbent.
I like when he says that campaign reform laws are really “Incumbent Protection Acts”.
Agreed, plus the point of incumbents having taxpayer paid staffs that work constantly for that incumbents reelection.