Former President Donald Trump defended his mixing up of former President Barack Obama's name for President Joe Biden's on several occasions, which some have pointed to as evidence of mental decline.

The former president said he "sarcastically" swaps their names, rather than forgetting whom he is running against, to indicate Obama is pulling the strings behind the scenes. To bolster his case, Trump pointed to a recent medical exam, which included a cognitive portion that he said he "aced."

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"Whenever I sarcastically insert the name Obama for Biden as an indication that others may actually be having a very big influence in running our Country, Ron DeSanctimonious and his failing campaign apparatus, together with the Democrat’s Radical Left 'Disinformation Machine,' go wild saying that 'Trump doesn’t know the name of our President, (CROOKED!) Joe Biden. He must be cognitively impaired,'" the 77-year-old wrote on Truth Social.

"No, I know both names very well, never mix them up, and know that they are destroying our Country," Trump said.

He then cited his recent physical exam results, released last week, showing his cognitive test results were "excellent," according to Dr. Bruce Aronwald.

"I just took a cognitive test as part of my Physical Exam, and ACED it," Trump wrote. "Also ACED (a perfect score!) one taken while in the White House."

Trump then suggested Biden should take his own competency exam to determine why he holds certain positions regarding immigration, energy, defense, and the Department of Justice, along with "so many other CRAZY things!!!"

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The former president's post comes as both his opponent in the Republican presidential primary, Gov. Ron DeSantis (R-FL), and Biden, whom he is expected to face in a general election, have started to highlight mistakes from Trump to increase concern among voters. Significant shares of voters have already indicated that Trump's age and competency are concerns in the 2024 election, but Biden's have proven to loom larger.

However, strategists have suggested that if Trump's age grows to become a larger worry for voters, it could give Biden an advantage.