Probably two reasons:
1. Trip hazard.
2. In the heat of the moment, they may not have recognized them as Trump’s and wanted any unknown object out of the way.
I’ve been in an active shooter situation. Your focus is on your survival and the survival of those “friendlies” around you. Everything else is insignificant.
I can and do fault them for a number of outrageous fails; the shoes are not one of them.
Oh, Iām not faulting them.
Love how RPOTUS asked, Can I get my shoe(s)?