The question is why does he trust Costa. Note the snide comments in this article. Makes no sense to me.
Three steps ahead...
Costa can be a useful idiot. A tool.
“Makes no sense to me”
Trump has spent the last 40 years dealing with the media...good and bad. He has a natural like for them, the good ones. He understands the role of the reporters in DC and doesn’t hold it against them as long as they are fair with him. Bob Costa is one who, I’m sure hasn’t stabbed him in the back...maybe always calling Team Trump to confirm a story.
He obviously had a message he wanted to get out there and wanted it to be widely heard in DC...hence the Wash Post.