"I grew up with never-ending wars," said Dirk Frazier, a longtime Trump supporter in Florida who once set up a stand to sell hot dogs to other supporters on a bridge leading to the president's estate at Mar-a-Lago.

But this time it's different, he adds. "Venezuela is closer to home."

Frazier vividly remembers growing up watching the types of messy foreign entanglements that President Donald Trump has vowed to avoid.

Those wars in Iraq and Afghanistan left thousands of Americans dead, tens of thousands wounded and millions of voters keen to avoid open-ended nation-building missions with limited success.

Now the seizing of Venezuelan leader Nicolas Maduro and a vow by Trump that the US would "run" the country has prompted concerns that the US would, once again, find itself responsible for rebuilding a deeply fractured country far from home.