On 10 Sep 2008, various folks received, from a McCain Campaign source:

          "Even before our national convention, the Obama campaign dispatched what The Wall Street Journal called a "mini-army of 30 lawyers, investigators and opposition researchers" to Alaska to dig up dirt for their personal attacks on Governor Palin and her family. FactCheck.org has called the attacks on Governor Palin, "completely false" and "misleading." However, the Obama Democrats continue to launch these attacks, hoping you'll never find out the truth."

No surprise.  Liars lie.  Seems liberals embrace Relative Morality, in which any individual is legitimate in deciding any bad deed is actually virtuous, if the bad deed advances 'the cause'.  Kind of like what some branches of Christians had decided a few centuries ago:  "the ends justify the means".  Liberals, with Relative Morality, have decided it’s virtuous to tell lies that promote liberal causes.  Seems liberals, as a group, have become habitual liars…  10 Sep 2008 was not new …

  - Most of what's not said about global warming is 'lies by omission', though there’s also plenty of both lies of commission and lies by implication. They show us the full-up Three Ring Lying Circus.  One of the leading liberal climatologists, Stephen Schneider, actually overtly and publicly encouraged lying for the sake of the agenda (and was quoted in Discover Magazine, October 1989):

          "Scientists should consider stretching the truth to get some broad-based support, to capture the public's imagination. That, of course, entails getting loads of media coverage. So we have to offer up some scary scenarios, make simplified, dramatic statements, and make little mention about any doubts we may have.... Each of us has to decide what is the right balance between being effective and being honest."

 - Remember also the Gore Campaign.  In December 2000, this group of liberals had a very interesting Florida campaign strategy (as reported in Washington Post and New York Times): get Gore votes into the public’s consciousness, loudly & repeatedly, even if you have to quietly take them back later; create the impression of winning.

Intentionally & loudly proclaim the lie, foster a false image. Then quietly just stop talking the lie when it’s found out. Indeed.  Liars won’t stop lying unless forced. 

That’s three ‘big campaign’ snapshots going back two decades. There’s more; it's what they get good at, whether by omission, commission, or implication.  But these three examples are big enough to suffice for a short essay. 

Lying can become an addiction.  Psychology tells us, confirming common sense and a few thousand years of theology, that some liars get so used to lying that they develop an inability to distinguish reality from fantasy. We hope, however, that only the most partisan Relative Morality Liberals have developed a difficulty distinguishing lie from reality. We have a greater hope that ‘inability to distinguish’ doesn’t (yet?) afflict most Americans generally. 

Since most Americans tend to be conservative, when given the chance to assess multiple views of an issue, we have a high level of trust in both hopes.