"One of the great lies about American politics is that Democrats genuinely subscribe to a set of core convictions that make Democrats different from Republicans. And the same thing, of course, applies to the other party. It's not true.
I happen to define myself as a conservative. Well, what do conservatives say they stand for? Well, conservatives say they stand for balanced budgets. Small government. The so called traditional values. Well, when you look back over the past 30 or so years, since the rise of Ronald Reagan, which we, in many respects, has been a conservative era in American politics, well, did we get small government? Do we get balanced budgets? Do we get serious as opposed to simply rhetorical attention to traditional social values? The answer's no. Because all of that really has simply been part of a package of tactics that Republicans have employed to get elected and to - and then to stay in office," - Andrew Bacevich.
You can buy his book here. My own defense of a similar kind of conservatism can be bought here.