Redux; Walker/Perry/Jindal/Pataki Attack Trump "They're all gone-he's still here"

What do all these article have in common? Lack of common sense and political nous.

 To paraphrase Bruce Springsteen;
"They're all gone-he's still here"

Rick Perry 

Walker pivots from Clinton, knocks back on Trump

Bobby Jindal blasts Donald Trump as 'a narcissist'

Kasich goes for the jugular in latest Trump attack ads