I remember we had a tinychat discussion over this topic a few weeks ago.
Learn liberty does a good job summing up why Corporation should be considered people for legal reasons.
I’d like to take it further and say that Corporations are nothing more than a collection of people and that if they wanted to, they should be allowed to bundle their campaign contributions and donate as a corporation. Corporations should be limited on how much they can donate based on how many people are coming together to donate through the corporation.
If a corporation has 100 member and 51 of them want to donate as the corporation, they have a maximum donation limit of $127,500 or the same as 51 individuals. If the 51 individuals don’t donate their full maximum allowable amount then they can still donate the rest in whatever manner they please (through other corporations or individually).