Politico newspaper reports that Republicans are discussing strategies that will make US President Joe Biden's return to the nuclear deal with Iran difficult.

The American newspaper added that the Republican members of Congress are planning to use legislative materials that impede any possible return to the nuclear agreement, about which the United States and the major powers are engaged in negotiations with Iran in Vienna.

The newspaper pointed out that Joe Biden's attempt to revive the nuclear agreement with Iran in order to reach a "longer and stronger" diplomatic agreement already faces deep doubts and potential obstacles in Congress, including the president's own party (the Democratic Party).

She explained that what she described as "hawks" of the Republican Party are seeking to have an opinion - and possibly an effective veto - on any attempt by the Biden administration to reverse the strict sanctions imposed by former President Donald Trump on Tehran.

Vienna negotiations focus on lifting US sanctions on Iran in exchange for Tehran's return to fulfilling its obligations in the nuclear deal (Reuters)

Politico noted that while Biden administration officials are holding indirect talks with the Iranians in Vienna, Republicans are discussing strategies that make it difficult for Biden to re-enter the nuclear deal, most likely using legislative tools linked to sanctions imposed by Trump during his tenure.

The parties to the nuclear agreement concluded a meeting in the Austrian capital last Saturday at the level of assistant foreign ministers.

It was agreed to hold a new meeting on May 7, amid Russian and Iranian optimism that the talks would proceed in the right direction.

According to the newspaper, many in the Republican Party are determined to "stifle" any Biden-led return to the nuclear deal with Iran, from which his Republican predecessor Trump announced his formal withdrawal in 2018.

Politico noted that it is almost certain that a return to the Joint Comprehensive Plan of Action (known as the Iran nuclear deal concluded in 2015) requires the Biden administration to lift some of the sanctions imposed under Trump, which could be subject to congressional approval, including from some "hawks." Democrats are opposed to the deal.