A bill to impose new sanctions on Iran over ballistic missile launches and other non-nuclear activities has been delayed in the U.S. Senate due to concerns about the presidential election.
Rouhani, whose moderate administration negotiated the nuclear deal with world powers, is seeking another four-year term.
Under Iran's Constitution, a president can not serve for three terms in a row.
Human rights campaigners say there have been few, if any, moves to bring about greater social freedoms as Rouhani's main focus has been boosting the sanctions-damaged economy.
The former hardline president (2005-2013) shocked everyone by registering for the election against the advice of the supreme leader, who said it would polarise the nation.
Iran may see its first female candidate for president next month as more than 600 people, including a man with five wives, throw their hat in the ring to try and replace Hassan Rouhani. As a former prosecutor, head of the Iranian judiciary, and attorney general, the well-known cleric has established hardline credentials, and his economic policy seems to reflect the preoccupations shared by Rouhani's declared opponents and the supreme leader. An 88-member elected clerical panel called the Assembly of Experts appoints the supreme leader and can remove one as well, though that's never happened. Registration remains open until Saturday.
Analysts describe Raisi as utterly loyal to supreme leader Ayatollah Ali Khamenei, meaning he would likely remain deeply suspicious of engagement with the West but unlikely to backtrack on the nuclear deal, which had the boss's tacit consent.
Arkansas tries to reverse execution drug ruling
Judd Deere, spokesman for Attorney General Leslie Rutledge, said the decision was out of step with precedent from the U.S. While those court proceedings affect all scheduled executions, a third legal issue centers around the case of Bruce Ward.
Ahmadinejad said his decision to run was meant to help former Vice-President Hamid Baghaei, a close confidant.
Born into a religious family in 1948, the mid-ranking Shi'ite cleric played an active role in the opposition that overthrew the USA -backed Shah in 1979.
According to the schedule released by Iran's Interior Ministry, the campaign for presidential race will kick off on April 28 and will continue until the end of May 17.
All hopefuls will be vetted by the Guardian Council, a body that oversees elections and legislation, from April 16 to April 20.
Former Iranian President Mahmoud Ahmadinejad said Saturday he does not view recent US missile strikes on ally Syria as a message for Iran, which he called a "powerful country" that the USA can not harm.
The election is scheduled for May 19. 6- Believer and committed to the Islamic Republic of Iran's fundamentals and also official religion of the country.