Hijo is son (I think hijos may also mean children) and politico means tactful or political according to my dictionary. We need one of our Spanish-speaking friends on AB to answer this - it looks like Tactful Son to me, but that doesn't make much sense from what you say in the post!
Yerno is son in law. Taking a literal translation for Spanish doesnt always work as sometimes doesnt make sense so would have to know the context of the article to proper translation