Ya think Trump etal is surrounded by mall cop types?
I highly doubt it!
Trump has his own private security force. They are probably quite a bit more skilled than the Secret Service guys. They do cooperate with the Secret Service on protective details.
I expect that both groups have contingency plans where they might end up shooting each other. And both groups have plans where they might end up shooting FBI Agents or Federal Marshalls.
Things could get incredibly messy in a direct confrontation.