Senator Marco Rubio (R-Fla.) has just sent a letter to President Obama demanding a few answers to some rather troubling questions:

During a House Homeland Security Committee hearing last week, Transportation Security Administration (TSA) Deputy Administrator, Dr. Huban Gowadia, confirmed that there are currently no federal air marshals on commercial flights between the U.S. and Cuba. This admission contradicts earlier claims by your administration that the federal air marshal agreement was finalized and they would be on commercial flights. Simply put, your administration has been caught in a bold-faced lie that has put American lives at risk.

Who decided that U.S. flights to Cuba would not have to carry air marshals?

So why are there any flights? Shouldn't we tell passengers to Cuba that these flights do not carry an air marshal? Why was this hidden from U.S. citizens flying to the island on the assumption that the aircraft is operating under normal aviation rules? All of this comes after we heard that the U.S. has not vetted Cuban airport workers and security procedures.

Frankly, the whole thing is embarrassing and further evidence that the Obama administration is either totally incompetent or determined to do a deal with Cuba at any cost.

Let's hope this topic comes up in the first Clinton-Trump debate.

Mr. Trump is signaling a shift by saying this:

We are also going to stand with the Cuban people in their fight against communist oppression. The President’s one-sided deal for Cuba benefits only the Castro regime. But all of the concessions that Barack Obama has granted the Castro regime were done through executive order, which means the next President can reverse them -- and that is what I will do, unless the Castro regime meets our demands. Those demands will include religious and political freedom for the Cuban people.

Let Mrs. Clinton defend the Cuba deal, or at least explain to U.S. voters what she thinks of flights without air marshals or not U.S. vetting of safety procedures at Cuba's airports. She should also comment on the embargo.

In 2012, Governor Romney lost Florida by 30,000 votes out of 8 million. President Obama never said to Cuban-Americans that he was negotiating to restore relations with the Castro regime. Instead, he took a hard line.

Let's hear from Mrs. Clinton today now that we know a few things about this U.S.-Cuba deal that were never disclosed in the rush to put an embassy in Havana.

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