“

You're allowed to express opinions without running afoul of defamation law, even as a president, and, in fact, there's a question about whether -- because he's doing this as President -- if this is somehow within the scope of his role as President. There's an absolute immunity from a Supreme Court case in 1982 when the president acts as president. It's not clear here whether he's acting within the perimeter of his role as President. But if he is, that would be another immunity.