good meme idea would be to have his real positions behind the sign
TVAnon here - it would make sense that each candidate had a lavalier mic pinned inside their jacket as a backup for the podium mic.
There are mounting techniques using various materials (moleskin, etc) to limit clothing rubbing on the mic – where it can be pinned inside the suit jacket to keep it hidden.
https://www.holyart.com/christmas/nativity-scene-accessories/control-units-and-accessories-for-nativity-scene/micro-projector-comet-for-frisalight-control-units
Perhaps something much more higher tech than this?