But despite no scheduled meeting between the world leaders, Rhodes dismissed the likelihood that a handshake meeting between Obama and Rouhani would occur by happenstance.
"I don't think that anything would happen by happenstance on a relationship and an issue that is this important," Rhodes said. "So I think, clearly, this is an issue that we devoted as much time to as any other issue on our national security agenda for the last five years. We have had a very carefully structured policy both in terms of the sanctions that we put in place on Iran and in terms of how we engage with the Iranian government and the international community on this issue."
In recent weeks, Rouhani has said that he is eager to negotiate an end to financial sanctions placed on his country because of its nuclear program. He has also insisted Iran has no interest in pursuing nuclear weapons.
On Capitol Hill, influential lawmakers including Sens. Robert Menendez (D-N.J.) and Lindsey Graham (R-S.C.) warned the president not to decrease sanctions “unless accompanied by real, meaningful action by the Iranian regime."
"Like you, we viewed the election of Hassan Rouhani as an indicator of discontent amongst the Iranian people and we have taken note of recent diplomatic overtures by Iran," they wrote. "However, whatever nice words we may hear from Mr. Rouhani, it is Iranian action that matters."