The liberal left have a playbook and they share it with all of their people. 

The first step is to DECEIVE.  The most classic example of this tactic is the myth of the back-alley abortion.  In the 1960's Bernard Nathanson and the group NARAL put forth a statistic that 10,000 women died each year from botched back-alley abortions.  He knew this number was false - exaggerated by about 4,000% - and really was between 200 to 250.  But he also knew the tactic of the big lie...make a false statement, repeat it often, get it picked up by the media, and soon everyone believes it.  When he changed his view on abortion after the advent of ultrasound technology and came forward with the truth, he fell victim to the second liberal tactic.

The second tactic is DEFAME.  When they engage in this process, they never let facts get in the way of the issue at hand.  In Nathanson's case, liberals blamed his change of heart on the fact that he is born again Christian.  Aside from the obvious fallacy that being Christian is bad, this argument is not true.  He changed his views in 1972 when the first ultrasound technology came out and he could plainly see that the fetus was a separate life; he was baptized Catholic in 1995.  There's hardly a cause and effect there, but no matter to liberals.  Just last night, Nancy Giles asked on MSNBC if John McCain is so opposed to torture, then "why hasn't he come out against" it?  This is a great example pointing out why Americans need to be discerning when they listen to actors.  There are dozens of articles about it, including this one from CNN, which highlight not only McCain's opposition to torture but his ability to stand up for what he believes rather than go with the herd.  With all this information readily available, you would think Giles could have done 5 minutes of research and avoided making a ridiculously inaccurate statement...but that defeats the whole premise of the left's tactics.

The third is to DECRY.  When they have nothing to work with they will simply talk down about someone.  After Sarah Palin's speech on Wednesday, Ron Allen of MSNBC had this to say about Sarah:  "She was really on the attack in a very sort of sarcastic, and velvety but, um, very direct way."  No bias included in THAT statement!  Tom Brokaw took extreme umbrage over Guiliani's use of the term earlier in the evening, but this is a sterling example of why people refer to the media as the "liberal media."  If you think Allen (a professional TV news reporter) was eloquent above, watch his one-sided duel with Newt Gingrich here.