I don't think Darfur is a left/right type of problem. There are a lot of different views amoung Republicans and Demoncrats on what to do. Some of the most conservative politicians support putting a strong effort to stop the genocide in Darfur because it's the right thing to do. A lot of liberals agree.
The trick is how to do it. Your solution depends on your view of the world. This is where having expertise and considering all the different angles is important.
Yes, it would probably be a mistake for the US to act on it's own. And we probably don't have the 30,000 troops it would take. A key to all this is to avoid this looking like an anti-Arab or anti-muslim campaign, which is what Sudan is trying to make it look like. In reality this is really just Muslim Arabs trying to take land from Muslim blacks.
The key is convincing some key Arab countries that stopping the genocide is the right thing to do. Once Sudan looses support from Arab countries, they will back down. But, Arab countries, like us, often look at things from a simple angle--the US and the world is against the Arabs.