Mr. Trump’s remarks at a rally in Florida came five days before a deadline that his administration and the Venezuelan opposition leader, Juan Guaidó, have declared for getting aid into the country, which has experienced long shortages of food and medicine.

What’s next: It’s unclear how the Venezuelan opposition would break the blockade. John Bolton, Mr. Trump’s national security adviser, said the U.S. military, which has airlifted supplies to the Venezuela-Colombia border, would not enter the country.

Another angle: The crisis has prompted plans for dueling concerts this weekend, one organized by the British billionaire Richard Branson and one by the Venezuelan government.

Double role for a major consulting firm

McKinsey & Company, which says it offers management advice to 90 of the world’s 100 biggest companies, also has a secretive $12.3 billion investment arm, prompting questions about conflicts of interest.

In Puerto Rico, where McKinsey is advising a board that seeks to reduce the island’s debt, the company’s hedge fund has investments in that debt, according to a report released on Monday.

Response: McKinsey says the way the fund is operated ensures that its employee investors do not stand to benefit from the firm’s inside knowledge. But those assurances have been challenged in Congress and in lawsuits.