A speech, at a rally, is mainly for supporters already. A lot of supporters can look up the information on their own, and probably already have if they're in the audience (especially at this point).
Obama isn't just speech, he has actually done a lot of work, including encouraging transparency in the government, lobbying and ethics reform, and worked to expand* Nunn-Lugar. He worked as a community organizer in the Southside of Chicago before going to law school. He was the first Black president of the Harvard Law Review. He has also taught Con Law...
Apparently, Hillary didn't get much out of being First Lady, seeing how piss-poor her campaign has been.
Furthermore, sexism and racism are two huge problems, but, I would argue, one is not more prevalent.
*Changed from "expanded" to "expand."