Trump instead is a “subject” of the probe, according to The Washington Post, but Toobin said that’s a distinction that could change quickly.
Toobin said “targets” are often charged and “witnesses” are generally people needed for information.
“In between the two, there is something called the “subject.” That is someone who is under investigation but who may or may not be charged. Trump is a subject, and I don’t think that is particularly good news for him. It’s a big deal to be under criminal investigation by the FBI, particularly if you’re president of the United States.”
“This confirmation that the president is under criminal investigation, that is a pretty profound thing to think about,” he added.