Through sheer force of will and a concerted effort to engage and educate President Trump, Mr. Rubio has made himself, in effect, a virtual secretary of state for Latin America, driving administration strategy and articulating it to the region from the Senate floor, as he did the other day, and every television camera he can find. Perhaps no other individual outside Venezuela has been more critical in challenging President Nicolás Maduro…

It was Mr. Rubio who has been whispering in Mr. Trump’s ear since the early days of his presidency about the depravity of Mr. Maduro’s government and the need for American leadership. And it was Mr. Rubio along with Vice President Mike Pence and others who urged the president to back an opposition leader seeking to unseat Mr. Maduro.

“He has been relentless since Trump’s election, working hard to earn the president’s trust in this policy area,” said former Representative Carlos Curbelo, a fellow Florida Republican. “He owns it and it has clearly paid dividends for him, and more importantly for the victims of Maduro’s tyranny.”