driven protests over corruption and high food prices choked parts of India's capital on Wednesday, heaping more pressure on a beleaguered government struggling to protect its credibility. Prime Minister Manmohan Singh's coalition faces multiple political crises, including multi-billion dollar graft scandals and surging food prices that have sapped its ability to push policies to keep pace with growth of nearly 9 percent. About 20,000 supporters of an opposition alliance led by the Bharatiya Janata Party (BJP) thronged parts of central New Delhi, bringing to the streets a protest that has seen an assertive opposition stalling the last parliament session. Protesters shouted slogans accusing the government of failing to curb corruption. Many participants, including women and children, wore garlands of onion to protest against a sharp rise in the price of the staple. “This is the exhibition of public anger, the beginning of a large nation-wide protest against corruption and inflation,” BJP spokesman Prakash Javdekar told reporters. Addressing a rally, BJP leader Arun Jaitley called for Prime Minister Singh's resignation on “moral grounds” if he failed to order a wider parliamentary probe into allegations of corruption in the allotment of lucrative telecoms licences in 2007-8. “The government cannot function in an atmosphere of suspicion,” he told the rally held near the Mughal-era Red Fort. The opposition has threatened to shut down a February session of parliament if the government does not agree to a joint parliamentary inquiry, which has wide power to summon officials, into a $39 billion mobile phone licence scandal. Telecommunications Minister Andimuthu Raja was sacked because of the scandal. Leaders from Singh's Congress party have been linked to graft during the Commonwealth Games and in seizing prime property in the financial centre of Mumbai. The deadlock in parliament has meant policymaking has drifted in limbo, economic reforms have been delayed and leaders including Singh have been accused of neglecting governance. The opposition is hoping to be able to sustain the political momentum until the parliament's budget session in February with a two-month country-wide protest programme. Some of the biggest state elections begin from May and stretch over the next two years.