The Obama administration is backing a compromise deal between lawmakers and the Pentagon on repealing the military ban on openly gay servicemembers known as “Don’t Ask, Don’t Tell.” The compromise would pave the way for a congressional vote to repeal the ban, but no changes would take effect until the Pentagon completes a lengthy review on the repeal’s impact. President Obama would also have to certify the repeal wouldn’t harm US military readiness. The review is due to Congress by December 1st.