Via Dana Goldstein, Ariel Boone earns a link by doing the work to put this chart together illustrating the earnings gap between men and women in the Obama White House. Total employment is split almost 50–50 between men and women, but the women are disproportionately concentrated in the lowest-level positions:
This is pretty much the same pattern you see everywhere, so not incredibly shocking. On the other hand, partisan politics has a distinct gender skew; about half of people are women, but well more than half of Democrats are women and in general women have more progressive views than men. Failing to locate talented women and promote them to positions of office and authority leaves progressives drawing from a relatively small talent pool given that numerically our “side” is preponderantly female.