Plus people rarely back a candidate for single issues.

It's entirely possible that Ray Dalio has some views on the tax code reform that may not align with mainstream republicans, but that doesn't mean the other 90% of policies the other politician supports align with his views. Or even that the other camp has the same tax reform policies in mind as he does.

I've seen many people who want to reform the tax code, which would involve a greater relative share of taxes for the top end, who wouldn't identify as democrats.