(some of us refuse to say his last name for a reason).

Mc-Cain

Per Cambridge dictionary - 'Mc is another spelling of emcee, a noun meaning a person who introduces or hosts an event. It is also an abbreviation for master of ceremonies, a person who leads or organizes a ceremony or event.

We all know who CAIN is.

I image it would be like saying a demon's name.

NOW Let's revisit the 'Mc'- DONALD'S thing.