U.S. President Joe Biden can’t catch a break.

The president’s hopes of counterprogramming the Republican National Convention were dashed Wednesday after he learned he had contracted COVID-19, forcing him to cancel an appearance before a key Latino advocacy group.

While Biden’s symptoms are mild, the diagnosis both removes him from the campaign trail and thrusts his health back into the spotlight — all at a critical moment where he is desperately trying to prove that concerns over his age and mental acuity are overblown.