This answer is based on The Talking Dead sneak peek for next week, so stop reading now if you don't want to know what's in it.
The governor says in his speech that soon the prison people will realize their people are gone. I'm guessing this means he's kidnapped or killed Michonne and Hershel. If it's kidnapped, he…

I'm scared for Michonne and Hershel.

I used to work for a court. Seeing the paroled murderers come back for committing horrific news crimes, and reading about psychopaths and other crazies taught me that people like the governor don't change.

If you don't want to know what's in the sneak peek for the next episode, stop reading now.

Thanks for the tip. Just found the clip on youtube.

People as crazed as the governor can't change. They always explode when under stress.

IMO, last week's episode was worth it now that I know where they were going with it.

If governor really cared about them, he'd tell the new people to ask to join the prison group, and then just leave them if the answer was yes. I guess he views the prison people as too soft since they often want to do the right thing. Still, under the guise of wanting to "protect," the governor is being power hungry…

I knew the governor couldn't change. People like that will always continue to explode when under stress.