“Negotiations over Iran’s nuclear program blew past a Tuesday deadline,” writes The Washington Post , “with diplomats struggling to reach con­sensus on the difficult issues of sanctions, enrichment research and future limits.”  

“In fact, the deadline was mostly about American politics. The Obama administration is trying to get an agreement with Iran before congressional critics have a chance to pass bills requiring their approval of any nuclear deal or imposing more sanctions on the country. Several bills are pending that would give Congress the option to reject a final accord.”