The hardline challenge to President Rouhani is building.

The Revolutionary Guards are defying his call to be silent on the nuclear issue. The hardline Endurance Front, with apparent support from the Guards, are pushing hard against Rouhani’s “softness” on political, cultural, and social matters.

The President is hitting back, at least in his rhetoric. Can he hold fast against the gathering opposition — and can he count on the support of the Supreme Leader?