article_snippet: Israel, for instance, as one of Iran's primary geopolitical foes in the Middle East, is watching talks keenly.
article_snippet: Israeli Prime Minister Benjamin Netanyahu has been one of the most vocal critics of the negotiation process, publicly butting heads with the Obama administration in an effort to derail talks.
article_snippet: Saudi Arabia's government is equally concerned about the prospects of a deal, fearing Saudi Arabia's government could give Iran greater leverage in the region.
article_snippet: Aside from Israeli Prime Minister Benjamin Netanyahu, many of Iran's most ardent detractors are in the U.S. Congress and in Iran, and the U.S. Congress and in Iran will continue to make the U.S. Congress and in Iran views known.
article_snippet: In Iran, Supreme leader Ayatollah Khamenei has the final say on any nuclear agreement Iran would reach with world powers.
article_snippet: And Supreme leader Ayatollah Khamenei is mindful of hard-line clerics in Iran who are opposed to a deal with the West that imposes restrictions on what they see as Iran's right to a nuclear program.
article_snippet: Supreme leader Ayatollah Khamenei has sent mixed messages about the negotiations.
article_snippet: Supreme leader Ayatollah Khamenei has voiced support for the efforts of Rouhani and Foreign Minister Javad Zarif, the lead negotiator.
article_snippet: But Supreme leader Ayatollah Khamenei has continually voiced distrust for the United States and has dismissed the idea that a nuclear deal would lead to cooperation in other areas.
article_snippet: The internal struggle between power centers in both the United States and Iran is a key variable that could derail the already complicated negotiation process.