Because they're all on the same team?
Maybe because Comey was on the team doing the investigating?
Read a great deep background on Comey here and how Trump went around him.
http://operationdisclosure.blogspot.ca/2017/05/trump-dropping-hammer-on-comey.html
and just for everyone's info I have nothing to do with this site. I got it from Greg Hunter @ USAWatchdog.com