The Biden campaign, for example, has been quick to respond to Mr. Trump’s assertions that Mr. Biden is too old to serve another term, producing their own clips of Mr. Trump’s verbal slips and other moments of confusion.
In recent days, the super PAC MAGA Inc., which has spent $36 million on an advertising blitz supporting Mr. Trump’s primary bid, has made urgent appeals to donors, pointing to internal projections that the Biden campaign will have spent $100 million on television by the end of the first quarter and as much as $300 million by the Republican National Convention in July.
In an email this week to one donor, the super PAC’s executive director, Taylor Budowich, said the onslaught of spending from Mr. Biden was an attempt to refocus voters on issues that resonated with independents and favor Democrats, such as abortion rights.
Mr. Trump would be positioned to defeat Mr. Biden, Mr. Budowich said in the fund-raising appeal, as long as the Trump team could keep voters focused on issues like the economy, national security and crime.
Focusing on issues, however, isn’t Mr. Trump’s strong suit. In his victory speech Tuesday, he repeated lies about his defeat in 2020 and added a new one, claiming that he won New Hampshire that year. (Mr. Biden did.) The remark raised another warning flag for Mr. Trump once he leaves the safety of the MAGA universe.