Sahimi writes in broad support of moderate and reformist elements of Iranian politics, considering himself a member of the Iranian Green Movement and often reprinting statements of prominent Greens. He holds the view that Iran's disputed 2009 election was fraudulent.
He has on many occasions defended Iran's nuclear program as being
peaceful, and the actions of Iran as being essentially legal and justifiable (originally in a seven-part series at Payvand entitled Iran's Nuclear Program). In the process, he has frequently levelled criticism against other writers on the subject, accusing Con Coughlin (of the UK Daily Telegraph) of knowingly spreading lies and disinformation, and David Albright of exceptional bias. (Albright responded to the criticism in a program on antiwar.com radio). He has also criticized two former Deputy Directors-General of the IAEA, Olli Heinonen and Pierre Goldschmidt, citing unnamed sources to accuse Heinonen of breaking the IAEA protocols by leaking confidential information (to David Albright) and of spreading unconfirmed claims about the contents of a laptop that was supposedly stolen from Iran and given to Western intelligence agencies, as part of a "crusade against Iran." He also accused Goldschmidt of having a "personal agenda" about Iran's nuclear program, whilst also disputing his assessment that Iran has violated the NPT.
In his writings on Iran's nuclear program Sahimi has also expressed the view that the United Nation's Security Council sanction resolutions against Iran are illegal. Because of his strong support for the Islamic Republic of Iran's nuclear program and the similarity of his arguments to those used by the Iranian government in its IAEA submissions, he has been accused of being close to the government in Tehran. Sahimi has denied these accusations, but has stated that his articles have been used without his knowledge by members of the Iranian political establishment including Ayatollah Rafsanjani.