I rather think that the MSM would like to see a Trump vs Hillary battle because they feel that he can be goaded into saying really stupid things. This is an example.
http://www.dailywire.com/news/960/no-ben-carson-didnt-lie-about-west-point-its-ben-shapiro#.VjzrIHREiFg.twitter#pq=A9pN4u
Really? The MSM actually tried accusing Trump of raping his 1st wife. Did I miss the rapist allegations against the others? Calling Dr Carson out for telling easily verifiable lies in print is not what I see as being tough on him. Did he or did he not dine with Gen Westmoreland? Did Westmoreland, or anybody else, offer him a full scholarship at West Point? If those things did not happen as he described, then he is lying. Pointing that out is not being tough in my view.