Is a loan to an individual to run their political campaign
reportable as a Small Business Loan? (under $1mm) Or would that be considered a Nonprofit? It is not real estate secured.

I have dificulty trying to make this a small business loan. Remember the three issues to think about:

Purpose
Borrower
Collateral

Your purpose is a personal gain (office). This isn't a business (though many do make a great deal of money from the goober they do while in office) The benefit or winning the office isn't a business in any form.

The borrower is a consumer (or did you do the loan under their political fund/organizationname?)

And those two then weigh together more than the third issue Collateral. While it really isn't important because issue one and two cover your choice, on a normal loan this would weigh in as the other 3rd of your decision.

It's either a loan to a not for profit campaign fund/organization (check that borrower issue) which is not reportable, or it's a consumer loan.