Iranian President Hassan Rouhani is on the charm offensive.

It's just days after Iran reached a landmark interim nuclear agreement with world powers.

Now, the government of this moderate president is shoring up support for the deal among conservatives and --- trying to silence critics.

(SOUNDBITE) (Farsi) IRANIAN PRESIDENT, HASSAN ROUHANI, SAYING:

"I want to assure our people that the principles set by people, the rights which belong to the people, the framework which the Supreme Leader has set, these will be applied until the end of the negotiations. Meaning that in the country, our nuclear right will be operational with more strength and clarity. Even the right of enrichment which is a part of our nuclear rights will continue."

Under the deal, Iran will pull back on its nuclear program -- in exchange for limited relief from crippling sanctions.

But to keep the deal on track, Rouhani's government must protect it from anti-Western hardliners and thei