Top US officials have reached out to key regional leaders to help resolve the political chaos in Iraq even as the Iraqi premier offered a general amnesty to undercut support for a raging jidhadist-led offensive. Prime Minister Nuri al-Maliki's offer on Wednesday came after a farcical opening to the new parliament in Baghdad, despite international calls for Iraq's fractious politicians to unite urgently to combat insurgents, as the military struggles to seize the initiative against the Sunni militants. With hopes of a unity government waning, Washington reached out to regional players with President Barack Obama calling Saudi Arabia's King Abdullah and Vice President Joe Biden contacting the speaker of Iraq's previous parliament, Osama al-Nujaifi, a prominent Sunni leader. The White House said Biden and Nujaifi agreed on the importance of Iraqis "moving expeditiously to form a new government capable of uniting the country."