Donors, you say? The people who sponsor The Regime's political advertising campaigns?

You had my interest, but now you have my attention.

President Biden has been using notecards in closed-door fundraisers, calling on prescreened donors and then consulting his notes to provide detailed answers, according to people familiar with the routine.

Why it matters: Biden's reliance on notecards to help explain his own policy positions -- on questions he knows are coming -- is raising concerns among some donors about Biden's age.

The president is 81 but claims he feels younger.

The staged Q&A sessions have left some donors wondering whether Biden can withstand the rigors of a presidential campaign, let alone potential debates with former President Trump, 77.

Biden advisers say the president is given notecards only for very detailed and technical questions, and say he frequently does spontaneous Q&As.

Uh-huh. When does Biden ever give "very detailed and technical" answers?

Most recent presidents -- including Trump, George H.W. Bush, George W. Bush and Barack Obama -- have carried crib notes, or used teleprompters, to help guide them through various public events and meetings.

In Biden's case, donors have noticed he's also using notecards in private events.

Below: An Italian TV sketch mocks Biden's dementia.