I personally think if we truly want to be a "world leader" we need to avoid slants toward any particular party to the degree possible, and seek to be as balanced in our approach to the world as possible.

When we slant it should be toward some clearly stated set of principles that we stand for. I think FDR's vision for a post WWII world is a good start point for such a discussion

1. The four freedoms: From fear and want, freedom of speech and religion;
2. The right of self-determination of governance
3. The end of colonialism (or other excessive unwanted external influence over ones governance and day to day lives);
4. The four policemen (in 1945 that was the US, China, Russia and the UK forming a network dedicated to deterring conflicts between others - of course we then broke into two camps and the rest, as they say, is history)

Making others like us is not working. Neither is blindly backing the play of a handful of "enduring" allies. Working to allow others everywhere to be more like themselves but without being able to abuse their neighbors is better, IMO.