Corporations are not people. PACs are not people. Union associations and issue focused groups are not people. When their right to free speech ends up suppressing the free speech of individual voters because of the difference in available financial backing, it is a problem. I support a limit on ALL donations regardless of source, and that limit needs to be at a level that gives everyone an equal chance at having a say, not just the loudest (most well funded) voices.
I do recognize that lobbyists and issue groups have the resources to do research in depth that a staffer may not have time or expertise to dig up for themselves, and I welcome their continuing input but only in the form of information about their area of expertise, not in the form of dollars. There is a great need for more data driven and fact based decisions, and special interest groups can play a valuable role in helping provide and present that information. But nobody should be buying politicians (and politicians should have more self respect than to allow themselves to be sold).