Krugman has a delicious story from Abraham Lincoln on blaming the other side when it's your fault. The punch line: "You will not abide the election of a Republican president! In that supposed event, you say, you will destroy the Union; and then, you say, the great crime of having destroyed it will be upon us! That is cool. A highwayman holds a pistol to my ear, and mutters through his teeth, 'Stand and deliver, or I shall kill you, and then you will be a murderer!'"
Ironically, the first Republican president was not just the "Great Emancipator", but also the "Great Investor," believing in the massive public works that the current Republi—CONs refuse to enact.