Following is the chronology of politics over the Indo-US nuclear deal:

• July 18, 2005: Prime Minister Manmohan Singh and US President George W Bush agree on a nuclear deal in Washington.
• March 2, 2006: India and the US sign the nuclear agreement during Bush's visit to New Delhi.
• March 11, 2006: Communist Party of India attacks government during a special discussion in Lok Sabha terming the accord as an 'unequal' treaty and one which would take India to the 'stable of US global strategy of containing China and Russia'.
• July 28, 2006: The Left parties demand threadbare discussion on the issue in Parliament followed by a statement by either the Speaker or Prime Minister Manmohan Singh.
• November 16, 2006: US Senate passes the Indo-US nuclear deal.
• August 3, 2007: India, US unveil the 123 Agreement.
• August 13, 2007: Prime Minister Manmohan Singh makes a suo motu statement on the deal in Parliament
• August 17, 2007: Communist Party of India-Marxist general secretary Prakash Karat says that the 'honeymoon (with government) may be over but the marriage can go on'.
• September 4, 2008: UPA-Left committee to discuss nuclear deal set up.
• February 25, 2008: Left parties say the UPA would have to choose between the deal and its government's stability.
• March 3, 2008: Left parties warn of 'serious consequences' if the civilian nuclear deal with the US is operationalised.
• March 6, 2008 Left parties set a deadline asking the government to make it clear by March 15 whether it intended to proceed with the nuclear deal or drop it.
• March 7, 2008: CPI writes to the prime minister, warns of withdrawal of support if government goes ahead with the Indo-US nuclear deal.
• March 8, 2008: The CPI-M says the government should drop the nuclear deal if the UPA-Left Committee does not approve it.
• March 14, 2008: CPI-M says the Left parties will not be responsible if the government falls over the nuclear deal.
• April 23, 2008: Government says it will seek the sense of the House on the 123 Agreement before it is taken up for ratification by the American Congress.
• June 17, 2008: Pranab Mukherjee meets Prakash Karat, asks the Left to allow the government to go ahead with IAEA safeguards agreement.
• June 30, 2008: Prime Minister says his government prepare to face Parliament before operationalising the deal.
• July 3, 2008: The Left parties decide to work out the timing and modalities of the pullout.

• July 8, 2008: Left parties withdraw support to government.