If you can get past the paywalll WS J. Might have it here https://blogs.wsj.com/washwire/2008/06/14/obama-if-they-bring-a-knife-to-the-fight-we-bring-a-gun/
Already tried that... I can get past most paywalls.
For the Wall Street Journal, all you have to do is copy the URL and paste it in the box over at Archive.is.
Alternatively, you can create a bookmarklet that will break the paywall there, the WashingtonPost and another for the NY Times and The Economist. :)
From that link:
“Washington Wire
Obama: If They Bring a Knife to the Fight, We Bring a Gun
By WSJ Staff
Jun 14, 2008 1:29 pm ET
[Editors note: This blog post was published in 2008.”