U.S. President George W. Bush challenged lawmakers skeptical of his new Iraq plan to propose their own strategy for stopping the violence in Baghdad, the Associated Press reported. «To oppose everything while proposing nothing is irresponsible,» Bush said Saturday. Bush said the United States will keep the onus on the Iraqi government to take charge of security and reach a political reconciliation. «We have a new strategy with a new mission: Helping secure the population, especially in Baghdad,» Bush said in his weekly radio address. «Our plan puts Iraqis in the lead.» The president, who hosted an informal, mostly social gathering of Republican leaders at Camp David on Friday night and Saturday, asked for patience from lawmakers from both parties.