Fox News reported Wednesday that a study requested by Congress on the number of aliens who succeed in illegally sneaking across the border was completed in November, but is being held back for political reasons. Sources within DHS told Fox News that the study shows that roughly half of adult aliens who attempt to cross the border make it. The Obama administration has been claiming that 80% of illegals are caught.
Read more here: http://www.foxnews.com/politics/2016/09/15/dhs-accused-sittingon-damning-border-report-as-immigration-issue-drives-presidential-race.html