Earlier today the Associated Press reported that court papers were filed by marriage equality opponents. The filings asked the Supreme Court to put a hold on D.C's new law that would allow same-sex couples to marry. The new law would take effect tomorrow. Opponents of the law argue that the people of D.C should have the opportunity to vote on the matter.
Moments ago, Reuters reported that Chief Justice Roberts rejected the request of marriage equality opponents to place a hold on the law. You can read more about the decision here.