Grand Ayatollah Sheikh Isa Ahmed Qassim (Arabic: آية الله الشيخ عيسى أحمد قاسم) is Bahrain's leading Shia cleric and a politician.

During elections the block adopted a wide program including: supporting the labor's union & demands, forbidding trade of Alcoholic drinks and separating men and women in higher education (like primary, intermediate and secondary schools).

They accused him to be the head of an Iran-based group called Hizbullah Bahrain, who were said to be behind a conspiracy to overthrow the Bahraini government.

[5] Some see this as a way for Qassim to avoid “submitting his opinions to internal democratic debate so that he can retain the final decision without paying the price for it”.

Throughout the Bahraini uprising (2011–present) Qassim has been a vocal critic of the government and has led the opposition to King Hamad bin Isa Al Khalifa.

"Bahrain’s Sunni rulers have treated Shiite anti-government protesters seeking greater rights in the Gulf kingdom as enemies of state."

[8] On 14 March, the Gulf Cooperation Council (GCC) agreed to deploy Peninsula Shield Force troops to Bahrain.

[13] On 20 June 2016, a week after the government of Bahrain suspended the main Shia opposition party al-Wefaq, Isa Qassim was stripped of his Bahraini citizenship.

An interior ministry statement accused Sheikh Isa Qassim of “using his position to serve foreign interests" and “promote sectarianism and violence".

Announcing the move to strip him of his Bahraini citizenship, the interior ministry said the cleric had "adopted theocracy and stressed the absolute allegiance to the clergy".

Regime controlled media last month reported an investigation was underway into a bank account of some $10 million in Qassim's name to “find the source of the funds and how they were being spent.”[24]