Vahid Salemi/ASSOCIATED PRESS Save for later Print Download Share LinkedIn Twitter With a new round of talks on the Iran nuclear deal now slated to start Nov. 29, both Washington and Tehran may have new concerns. "It's unclear whether the Iranians, whose team has changed since the presidential transition, will approach the renewed Vienna negotiations based on prior progress or with an altogether new set of demands," says Naysan Rafati, with the International Crisis Group. He notes that even in June, when the talks broke off, key differences remained on core issues. Meanwhile in the US opposition Republicans are gaining political momentum, and will almost certainly oppose any renewed Iran nuclear deal if they retake Congress next year or the White House in 2024 elections. The "specter of a Republican president taking office in 2025 reduces the likelihood" of any forthcoming sanctions relief from a revived nuclear deal, admits London-based Iran analyst Esfandyar Batmanghelidj. But he argues that "does not negate the certain benefits of sanctions relief on offer now." Meanwhile, Iran has accumulated "more than 210 kilograms of uranium enriched to 20%" and 25 kg at 60%, Atomic Energy Organization of Iran spokesman Behrouz Kamalvandi said Wednesday, according to state news agency IRNA.