The Guardian | Julian Borger andPatrick Wintour : President unlikely to certify pact this week, triggering complex battle in Congress and Europe over ultimate fate of agreement
No one is able to predict whether that struggle will lead to a reimposition of US sanctions, the collapse of the agreement and the rapid scaling-up of Irans nuclear programme. It could result in a compromise that leaves the deal alive but opens the way for a more combative policy towards Tehran on other fronts.
We are on a tightrope. We dont know what will happen, a western diplomat said.
The congressional contest will pit most Republicans against almost all Democrats, hawks against doves, and will be played out under rules drawn up for a completely different set of circumstances.