Do parenthetical statements change subject-verb agreement? [duplicate]

When I need to focus on a specific instance of a subject, but want to include a clarifying remark making it plural, I may set off that secondary statement like this:

The state of Florida (and 27 other states in the US) has/have Right-To-Work laws.

I'm not asking about parenthetical pluralization where you add an optional (s) to the subject when the quantity is not known (e.g. vendor(s) as in this post), but a clarifying statement that is part of the subject (or maybe it isn't; that's what I'm asking).

So is the subject of this sentence above singular or plural? Which is the correct usage in my example?

Solution 1:

According to Chicago manual of style:

Q. If words in parentheses would turn a singular subject into a plural subject, should the verb (outside the parentheses) be plural? I’m wondering specifically whether “applies” should be “apply” in this sentence: A case such as this illustrates a broader category in which justice (and, therefore, injustice) no longer applies.

A. Your sentence is correct as written. Parenthetical content should not leach into the syntax of the containing sentence. If the information is so important that you feel it shouldn’t be ignored, take it out of parentheses: A case such as this illustrates a broader category in which justice and injustice no longer apply.

I think it is a matter of style rather than grammar ( if I were to read it aloud I would probably use the plural, as the parentheses cannot be heard).

The quote is from a Q&A, and might just be the opinion of the person answering the question.