Ashipping corporation supporting the campaign of an ohio congressman for the post of governor would be protected by the first amendment under the category of

Political Speech  
In a free society, people and associations are and should be allowed to relate in any capacity they wish, to talk as they wish, and to spend their cash as they wish, gave just that in the process they regard the privileges of others to do likewise. The Declaration of Independence talks about the basic rights that every human being is born with and should enjoy and the first amendment rightly protects free discussion when it comes to government stuff

What he said

Good luck : )