The median female salary ($2,926) for July was also about 15 percent less than the median male salary ($3,370).

The results are consistent with those of other Free Beacon reviews of salary data for the White House, Democratic members of Congress, and President Obama’s re-election campaign.

In 2011, female White House employees made about 18 percent less than their male counterparts, the Free Beacon found.

More than a dozen Democratic Senators paid their female staff members at least 20 percent less than male staffers during that same period.