NEW YORK - Pakistan Muslim League-N leader Nawaz Sharif has threatened to pull his party out of the governing coalition if it does not decide by Friday  (today) about the reinstatement of judges sacked by former president Pervez Musharraf, but said he will not bring about the collapse of the government. In an interview with The Wall Street Journal, Sharif said that the sacking of the judges last year had shaken the foundations of the country and it was necessary to restore them to their jobs. "We will not try to bring the government down," Sharif said in remarks published on Thursday. "But of course we then have no choice but to sit in the Opposition." Sharif said Zardari had earlier assured him that the judges would be reinstated within 24 hours of Musharraf's impeachment. "We supported him on impeachment. It's now his turn to support us on the reinstatement of judges." About the next president, Sharif said it should be someone from outside the two main parties. He has put forward the name of Ataullah Khan Mengal, a well-known politician from Balochistan. He said Parliament has yet to have a debate about a new strategy for addressing Pakistan's growing militancy. While Musharraf was regarded as a vital US ally for pressing Pakistan's security forces to battle militants, Sharif says a more democratic debate is needed to swing domestic support behind any new security policy. Such debates will underpin better ties with the US, he added. "They've been supporting a dictator for eight long years," Sharif said of the US. "They've equated Mr Musharraf with the 170 million people of Pakistan. That wasn't a good policy." About other problems facing Pakistan, he said: "We know the economy is in trouble. I think the problems this country is facing can't be dealt with single-handedly. We have to fight together." Sharif, the prime minister Musharraf ousted, said he bore no grudge against the former military ruler but he must be held accountable for his actions. "I'm not a man who believes in revenge. Although he mistreated me, I don't have any score to settle with him. But somebody who dismisses the parliament, subverts the constitution, arrests the judges must tell the people why he did that. He must answer these questions under whatever forum the law provides," he said.