Former CIA Director John Brennan expressed deep worry and concern Friday about leadership and the nations safety in the wake of Donald Trump s ugly Twitter attack against Alec Baldwin over the actors portrayal of the president on Saturday Night Live .

Brennan was asked by Nicolle Wallace on MSNBC if he thought Trump was too unstable to possess the nuclear codes that would allow him to launch an attack. Brennan responded that he was rattled by the presidents strange focus on Baldwin the morning after Russian President Vladimir Putin boasted of his nations nuclear capabilities to strike anywhere in the world, including the U.S. A simulated video presented by Putin appeared to depict next-generation nuclear missiles striking Florida .

Trump has yet to respond to Putin. Instead, he ranted against the actor in an error-riddled tweet early Friday morning (the tweet was later reposted with corrections).

When I hear what Vladimir Putin was saying about the nuclear capabilities he has [and] then the president of the United States is tweeting about Alec Baldwin this morning, I mean, where is your sense of priorities? Brennan asked. I think a lot of Americans are looking at whats happening with a sense of: This is surreal.

Theres deep, deep worry and concern for this countrys national security, he added.