Doesn't do any good when people keep gouging away at it.

A real test for our political leaders, By Gloria Borger, CNN Senior Political Analys

Washington (CNN) -- It is probably some form of poetic justice that, in reacting to the attempted murder of a congresswoman and the murder of a judge, some of the political discourse has devolved into an unhelpful and unenlightening argument that goes something like this: It's your fault; no, it's your fault.