Some Brits quickly grew suspicious - was Obama pandering to his audience with this Britishism? Or was this a secret sign that someone British had been helping him craft his speech?
OK, it's certainly true that queue is used relatively rarely in American English: As the Oxford English Dictionary says in its listing for the word, it is a "chiefly British" word. But this isn't exactly a smoking gun. As James Ball of Buzzfeed UK was quick to point out on Twitter, Obama has actually used the word "queue" a number of times before.
You can see it in this White House transcript from 2010, for example, when Obama says: "There were several people who were still in the queue who didn't have a chance to speak prior to us breaking." Or in another transcript from 2011, when he says: "Could I just say that Chuck is the only guy who asked two questions - so far. So just - when I cut off here, whoever was next in the queue - I'm messing with you, Chuck." Or in yet another transcript from two years after that, when he says: "We've got to make sure that we have a legal immigration system that doesn't cause people to sit in the queue for 5 years, 10 years, 15 years - in some cases, 20 years."
The instances of Obama using "queue" do seem relatively rare, but they exist and they appear to be off-the-cuff comments. And importantly, in none of the above examples was the President being used to trick British people to not act in their own interest. In fact, Obama has something of a habit of using British English. According to "Britishisms," a blog run by University of Delaware English Professor Ben Yagoda with the aim of catching the British English that enters into American daily life, the President has also been caught saying things like "full stop," "run to ground" and "take a decision".
Why would Obama be keen on British English? Well, you could probably make an argument that it comes from his father, who spoke English with a British accent. Additionally, for years people have noted that Obama's use of language tends to shift depending on his audience - it's certainly plausible that he was subconsciously placating those worried about Britain's sovereignty with the use of some British English. Or perhaps it was simply an attempt to sound fancy.
He may also be a fan of Netflix. Yes, in 2014 the New Republic warned that "Americans have started saying 'queue,' " because of the popular movie-and-television subscription service, which uses the word to refer to a playlist. To some that may sound like rubbish, but there are plenty of other signs that British English is seeping into American English more and more regularly.