Former CIA director John Brennan -- shown here in September 2016 -- says he knows he has a "bullseye" on his chest over his comments on Donald Trump (AFP Photo/MARK WILSON)
I saw the sentence from this article. I think it's a figurative speech. My big guess would be that John Brennan put himself on the spot where he could receive some potential (verbal) attacks from Trump supporters, after he put those comments on Donald Trump. But I am not sure if I get it right.
Is it a common metaphor?