Former President Trump said Wednesday at a campaign rally that his recent mix-up of other politicians' names was intentional.

Why it matters: Trump, like President Biden, has faced scrutiny about his age and mental acuity, especially among Democrats who seized on the gaffes as another reason he's unfit for a second term.

Context: In a speech last month, Trump switched the names of his GOP primary opponent, Nikki Haley, and former House Speaker Nancy Pelosi (D-Calif.).

• Biden's campaign seized on the moment by sharing it on social media, and in a campaign ad.
• He's mixed up Biden and former President Obama at least seven times in recent months, per Forbes. He said he does so "sarcastically," and referred to a conspiracy theory that Obama is highly influencing the White House.
• In October, the former president also confused Hungary's Prime Minister Viktor Orbán with Recep Tayyip Erdoğan, the president of Turkey.

The other side: Age and mental acuity are a significant concern for many voters when it comes to a second term for Biden.

• Adding to the woes, special counsel Robert Hur wrote in a report last week that Biden's memory "appeared to have significant limitations."
• "I'm well meaning, and I'm an elderly man, and I know what the hell I'm doing," Biden said last week in defense of the assertions in the report.
• House Republicans are planning long-term hearings and possibly subpoenas related to Biden's mental state.

Zoom out: Voters are more concerned with Biden's age than Trump's.

• Voters are more concerned over whether Trump is "corrupt, criminal, crooked," according to an AP-NORC poll from August 2023.
• Biden is already the oldest sitting president. He would be 86 and Trump would be 86 and 82, respectively, at the end of a second term.

Go deeper: Trump leads with Metro Detroit swing voters who say Biden's too old