They came to see Mitt Romney.
But an uninvited guest called Isaac threatens to steal the show at the Republican National Convention in Tampa, Florida.
The Tropical Storm has already forced party officials to delay the start of their gathering by a day. It is expected to spare Tampa a direct hit but strike, with hurricane strength, further along the Gulf Coast.
Republican candidate Romney told reporters it would be a ‘great convention’ but said he was concerned about those who will be affected by Isaac.
That is the Republicans’ challenge – to celebrate their candidate without appearing insensitive to those at risk from the storm.
The Occupy movement is also hoping to gatecrash the would-be president’s party, with activists gathering in Tampa.
“We are here to protest the fact that the Republican National Convention will not be focussing on any of the real issues that matter to the American people, such as unemployment,” said demonstrator Yoni Miller.
Florida’s cycling police officers will try to stay on course whatever Isaac has to throw at them. Mitt Romney will be hoping he can do the same.