It should also be pointed out that we only ever apply the term "ideologue" to somebody that we don't agree with. The simple fact of the matter is that anybody with an opinion is an ideologue. I have an ideology, you have an ideology, Johnson has an ideology, and Obama has an ideology. We're all ideologues.
please, Obama has not stuck with any ideology when his actions are reviewed.
Most people do not. Principles and ideology are mostly expendable in a compromise where core core principles and values are not at stake. People cannot eat principles.
Libertarians (the ones today who are hiding behind the label) have this quirk about being principled against reality and following their principles to their logical conclusions would wreck havoc on any system.
even Jefferson put his principles aside for the sake of the nation and reality vs ideological purity. He preached a good game, but his practice was different.
Politics is a window into how a system will be governed. Compromise is the art of politics. Compromise abhors ideological purity.