7 Moreover, it would be a crime to distort this name of Christian Democracy to politics, for, although democracy, both in its philological and philosophical significations, implies popular government, yet in its present application it must be employed without any political significance, so as to mean nothing else than this beneficent Christian action in behalf of the people. For, the laws of nature and of the Gospel, which by right are superior to all human contingencies, are necessarily independent of all particular forms of civil government, while at the same time they are in harmony with everything that is not repugnant to morality and justice. They are, therefore, and they must remain absolutely free from the passions and the vicissitudes of parties, so that, under whatever political constitution, the citizens may and ought to abide by those laws which command them to love God above all things, and their neighbors as themselves. This has always been the policy of the Church. The Roman Pontiffs acted upon this principle, whenever they dealt with different countries, no matter what might be the character of their governments. Hence, the mind and the action of Catholics devoted to promoting the welfare of the working classes can never be actuated with the purpose of favoring and introducing one government in place of another.
Source: Graves de Communi Re (Vatican.va)