President Obama assumes Congress will get in line and follow the United Nations's approval of the Iranian nuclear deal.

"This is by far our strongest approach to ensuring Iran doesn't get a nuclear weapon," Obama said today in response to a question in the Oval Office about the United Nations move.

"There is broad international consensus around this issue. Not just among the international community but also among experts in the nuclear proliferation and my... assumption is that Congress will pay attention to that broad-based consensus."

Obama is meeting with Nigerian president Mahammadu Buhari today in the Oval Office.