I took it to mean "third parties politicize CBO reports" rather than "CBO reports are created with ideological slants," because, well, that's the truth of the m

I took it to mean "third parties politicize CBO reports" rather than "CBO reports are created with ideological slants," because, well, that's the truth of the matter. You can't criticize a CBO forecast for being slightly inaccurate when politicians decide to change the parameters after the fact.