My guess is he tries to pick a fight with Sarah Palin, all that is missing is that Apparatchik Trumpka...
What a flippin' Doofus..
Given the extent of unionization in the trade show and event industry, Trumka will have plenty of his minions on site. Hopefully that will be mitigated a little by the fact that Florida is a right-to-work state, but there will still be a strong union presence even inside the convention.