Are politicians family members off limits?

I’m still waiting for the politician who campaigns alone, and when asked why their family isn’t there says something like, “a political campaign is basically a job interview, and I don’t bring my family to job interviews. Like many Americans, I’ll do my job as best I can, whatever might be going on back at home.” That’s what it would mean to take the “compartmental” approach before it becomes a matter of desperate political convenience.