Thanks to Hugh Hewitt for pointing me to Dan McLaughlin's series on "The Integrity Gap" between McCain and Obama.  It is an extremely well documented look at what may well be the key issue in this race,

Part I talks about Governor Sarah Palin:

One of the most basic ways in which a candidate can demonstrate the integrity voters are looking for is to build a record of standing up to corruption and waste - and doing so even when it appears in his or her own party, or on the part of his or her own allies or backers. This is not just a matter of honesty and prudence, but of toughness and courage.

Part II Chapter 1

Introduction

Chapter 2 Obama's Rootless Ambition

looks at the influences that shaped Obama before he ran for office.

Chapter 3 Obama and the Extremists

looks at his relationships with left-wing radicals and how they were an integral part of his rise in politics.

Chapter 4 Obama and ACORN

looks at his intimate relationship with a network of community organizers with a pervasive record of voter fraud and deep involvement in the subprime housing crisis.

Chapter 5 Obama and the Machine

looks at Obama's long, deep and multifacted partnership with machine politicians in Chicago and Springfield.

Chapter 6 Obama and the Favor Factory

looks at Obama's routine practice of trading favors with his political benefactors.

Chapter 7 Obama, "New Politics" and Principles

looks at the illusory nature of Obama's "new politics," his absence of a record of fighting tough battles on principle, and wraps up and concludes the series.

Part III is yet to come.