As their "political marriage" is all set to end, Left parties are out to target the ruling UPA for which they are preparing a "chargesheet’ against the government detailing its "unkept promises" and "obsession" with the nuclear deal.

The CPI(M), CPI. RSP and Forward Bloc will come out with a "chargesheet" citing UPA's several drawbacks and failures, including "rising prices and inflation, surrendering of national interest, and unkept promises with regard to the Common Minimum Programmeme (CMP) ’, a senior I eft leader said.

Feeling "hurt" by Samajwadi Party's "betrayal", the Left parties will also “expose the marriage of convenience" between Congress and SP in its campaign, said the leader on condition of anonymity.

The Left campaign against the UPA will be launched on July 14 in the capital, where top Left leaders will "attack" the government for its "refusal" to take appropriate steps to tackle the runaway inflation and back-breaking price rise besides explaining their opposition to the deal.

Plans are afoot to field top leaders itself, who will criss-cross the country attending public meetings and rallies organised in major towns in all states, to explain the Left position. Meanwhile, government is unlikely to reply to Left parties’ demand for clarification on whether it was going to the IAEA till the return of Prime Minister Manmohan Singh from Japan on July 9.

Left sources said they expect the next meeting of UPA-Left committee to take place after Singh's return during which the government is likely to give the reply.

Left parties, which have decided to withdraw support the moment the government proceeds to operationalise the Indo-US nuclear deal, yesterday set the deadline of July 7 for the ruling coalition to clarify whether it was going to the IAEA.