In politics, there is -- by definition -- no such thing as a fair fight. HOWEVER, there is such a thing as ruling justly.
A politician that hews to the Consitution and BoR, rules justly. A politician that abrogates the Constitution and BoR, rules unjustly and sets us on the road to tyranny.
I don't care about a fair fighter. I care about making sure I do not help elect a would-be tyrant.
If you want to call that the 'ends justifying the means' so be it. Democrats must be defeated. Bush does a good job of that, so he is my man.