Iranian President Hasan Rouhani doesn’t like it that in a republican democracy, legislatures, representing the plebes, get a say in what the republican democratic government does internationally—including agreeing to treaties and Executive Agreements. From this, he “accused” Congress of “meddling in sensitive negotiations” about Iran’s nuclear weapons program.
What the US Senate says, or what the US House of Representatives want, or what the extremists in the US are looking for, or what the US mercenaries in the region say, it doesn’t have anything to do with our government or our people…. We announce that the side that we deal with is not the US Senate or the House of Representatives—it is a group called the P5+1[.]
However, this thing has everything to do with our government and our people—us Americans on the other side of this…negotiation. And so Congress is obligated to say, to want, to look for.
Rouhani probably wants to (re)read the letter 47 of those US Senators sent him a bit ago.