CARACAS: As US forces deployed in the Caribbean have zoned in on tankers transporting sanctioned Venezuelan oil, questions have deepened about the real motivation for Donald Trump’s pressure campaign on Caracas.

Is the military show of force really about drug trafficking, as Washington claims? Does it seek regime change, as Caracas fears? Could it be about oil, of which Venezuela has more proven reserves than any other country in the world?

“I don’t know if the interest is only in Venezuela’s oil,” Brazil’s leftist President Luiz Inacio Lula da Silva, who has offered to mediate in the escalating quarrel, said last week.

The US president himself has accused Venezuela of taking “all of our oil” and said: “we want it back.”

What we know: