WSJ takes on Biden's age, White House fires back

In a 3,000-word story headlined "Behind Closed Doors, Biden Shows Signs of Slipping," The Wall Street Journal reports that in meetings with congressional leaders, President Biden "appears slower" and "has both good moments and bad ones."

Why it matters: Biden's age and acuity are among the GOP's top attack lines. Poll after poll shows Biden's age, 81, is a major concern among voters.

Trump, who turns 78 next week, isn't far behind. Despite his own public slips, the polls find voters are less concerned about Trump's mental fitness.