I just read in news about "Controlled Application Review and Resolution Program (CARRP)". It appears that this program has been used to delay or deny applications by some with a Muslim background. You can read about it here: http://www.alexandrianews.org/2017/06/court-hands-trump-administration-another-defeat-on-immigration/
If you know anyone who's been delayed or denied, ask them to contact ACLU or one of the other legal organizations involved in this lawsuit.