BJP president Rajnath Singh has convened a meeting of senior party leaders at 5 pm on Tuesday to discuss how one of the NDA constituents could be convinced to bring a no-confidence motion, according to the sources.

“BJP cannot vote with the Left parties against the government as they are toeing an anti-US line which is in contravention with our party’s stand,” a BJP leader said.

The party is not opposed to the Indo-US nuclear deal per se but is opposed to it in its present form, he said.

Tuesday’s meeting will also discuss the possibility of meeting President Pratibha Patil after the Left parties withdraw support on Wednesday morning.

“We are also discussing whether an emissary should be sent to the Left parties to work together on toppling the UPA government,” the BJP leader said.

Earlier in the day, Rajnath Singh said the Prime Minister should seek a vote of confidence in the Lok Sabha.

He termed the UPA-Left alliance “unnatural and unholy”.