A yellow excavator, forklift and other heavy equipment made by U.S. firm Caterpillar gleam outside Cuba's annual trade fair, reflecting once-bright hopes for increased U.S.-Cuban commerce fanned by the 2014 detente between the old Cold War foes.

But inside the pavilion where U.S. firms present their wares, only eight have stands this year, according to a Reuters count. That is down from 13 last year and several dozens in 2015-16, underscoring the decline in U.S. business interest since Donald Trump became president.

Last year, the Trump administration tightened the decades-old trade embargo on the Communist-run island once more and sharply reduced staffing at the U.S. embassy in Havana due to a series of health incidents among U.S. diplomats.