Eric Trump has sent a poignant message after his father, Donald Trump, was shot in the ear during a rally in Pennsylvania on Saturday.

“Toughest man I have ever met,” Eric told Page Six of the former president, whom the Secret Service has confirmed is safe and being evaluated at a local medical facility following the incident.

Butler county District Attorney Richard Goldinger confirmed to ABC News that the shooter — who was “on the roof of an adjacent building” — is dea.

3

3

At least one rally-goer was killed and another seriously injured.

This story is developing…