Watch: Donald Trump Shows He Still Doesn't Know the Difference Between England, Britain and the U.K.

President Donald Trump once again displayed a fundamental misunderstanding of the very makeup of one of the United States' closest allies, suggesting of Great Britain: "they used to call it England."

Trump made the remark during a rally in Wilkes-Barre, Pennsylvania, Thursday to campaign for Republican Senate candidate Lou Barletta. As has been common for him on the campaign trail ahead of the crucial 2018 midterm elections, the president only briefly touched on the candidate he was there to boost.

Instead, he zig-zagged through a variety of issues, from the moment he announced his campaign for president to falsely claiming Russia was "very unhappy" that he went onto win the election and branding the media as "horrible, horrendous people."

He also delved into his recent visit to the United Kingdom.

"I have great respect for the U.K. United Kingdom," Trump said in Pennsylvania. "Great respect. People call it Britain. They call it Great Britain. They used to call it England—different parts."

To be clear, England is one of the four countries that make up the United Kingdom—the others being Scotland, Wales and Northern Ireland. Great Britain is also a different entity, and comprises of England, Scotland and Wales.

It is not the first time Trump has shown an inability to grasp the difference between England, Britain and the United Kingdom.

During his trip to the U.K. last month, which featured multiple large protests against his presence, Trump made a similar assertion.

"They make phenomenal things, you know, and you have different names—you can say 'England,' you can say 'U.K.,' you can say 'United Kingdom,' so many different—you know you have, you have so many different names—Great Britain," he told The Daily Mail. "I always say: 'Which one do you prefer? Great Britain? You understand what I'm saying?'

Trump then tried to brush off the gaff after being told by interviewer Piers Morgan that Great Britain and the United Kingdom were not the same thing.

"Right, yeah. You know I know, but a lot of people don't know that," Trump responded. "But you have lots of different names."

donald trump, england, britain, u.k.
President Donald Trump speaks at a political rally at Mohegan Sun Arena in Wilkes-Barre, Pennsylvania on August 2, 2018. Trump again displayed a failure to understand the difference between England, Britain and the United Kingdom. MANDEL NGAN/AFP/Getty Images

It appears Trump has not brushed up on his geopolitics in the weeks since. Suggesting that "England" is another name for "Great Britain" or the "United Kingdom" is unlikely to go down well in Scotland, where national pride is strong and which in recent years has pushed for greater autonomy and even had a narrowly defeated vote on securing independence from the rest of Britain. It is also where Trump owns a golf course.

Watch: Donald Trump Shows He Still Doesn't Know the Difference Between England, Britain and the U.K. | U.S.