I would have given that salesperson my most put-on dumb look and said “what inauguration?”
I did that once with a hillery supporter at the Duchess County (NY) Fair in 2000 when she first ran for senate. There were tons of people and I wondered out loud to Mr.FF why the crowd. Some little old lady with a straw hat that said “hillery” poked her face in front of me and with a beatific smile said “hillery is here!” I looked at her and said “hillery who?” The expression on her face was worth it!
I wish I had thought of that! LOL!