President Trump's keynote speech at a Saudi sovereign wealth fund's conference in Miami Beach was well-attended by adoring fans and key lieutenants.In the venue's packed lobby, the mood was a bit antsy among portfolio managers and financial consultants who had waited for hours.Many finance professionals had high hopes for Trump's first second-term, in-person address to the international business set.Some attendees were turned away and had to watch Trump's speech on a closed-circuit screen.