WASHINGTON (AFP/Reuters) - The White House vowed Tuesday there would be no 'blank cheques for Pakistan after two top US senators unveiled plans to expand and overhaul civilian aid to the key US ally. The statement came as President Obama presents his strategy for defeating Al-Qaeda to the leaders of Pakistan and Afghanistan on Wednesday (today) amid growing US concern that it is losing the war and neither is a reliable ally. The President has said on numerous occasions there shouldnt be and there wont be blank cheques, White House spokesman Robert Gibbs said. The President supports the building in of accountability measures to ensure that we are making progress and if progress isnt made then well readjust our strategy. Democrat John Kerry, chairman of the Senate Foreign Relations Committee, and Republican Richard Lugar, the panels ranking member, introduced legislation on Monday calling for a tripling of US civilian aid to Pakistan to 1.5 billion dollars per year over the next five years. The White House backed the Presidents of both Pakistan and Afghanistan on Tuesday, despite criticism which has targeted both leaders in Washington and abroad ahead of their White House summit. Afghan leader Hamid Karzai and Pakistani President Asif Ali Zardari are each due to hold bilateral talks with President Barack Obama on Wednesday (today) before a three-way meeting at the White House. The President supports the democratically-elected governments of both of these countries and looks forward to working with each, and working together trilaterally to address the extremist threat, said White House spokesman Robert Gibbs. Meanwhile, Afghan President Hamid Karzai said a White House summit with his Pakistani counterpart will discuss closing militant 'sanctuaries' in Pakistan. Karzai said that Afghans overwhelmingly opposed Taliban extremists but that the world did not address the 'sanctuaries' across the border in Pakistan. Tomorrow we will have an occasion between us - Afghanistan, Pakistan and America - to address this very question, Karzai said on the eve of a three-way summit with US President Barack Obama and Pakistani President Asif Ali Zardari. Afghanistan will do all that it can, in immense friendship and brotherhood with Pakistan and alliance and friendship with America, to address it, he told the Brookings Institution think-tank. The Afghan leader said Afghan-US relations are fundamentally solid despite friction over aid policies, corruption and civilian deaths in American bombing raids. The fundamentals of this relationship are very, very strong, he said. Meanwhile, President Obama presents his strategy for defeating al Qaeda to the leaders of Pakistan and Afghanistan on Wednesday (today). The White House meetings with Pakistani President Asif Ali Zardari and Afghan President Hamid Karzai are likely to be cagey affairs - both visitors have been heavily criticised by Obamas administration and are also wary of each other. Equally, Obamas new strategy for defeating Al-Qaeda and Taliban militants operating in Afghanistan and Pakistan has not been universally welcomed in either country. It will be Obamas first face-to-face meeting with the two men to discuss his new regional strategy and is a chance to air his concerns about corruption and poor governance. One of the biggest challenges will be to convince Pakistan to take the threat of militancy seriously and prevent the Taliban from using its soil to attack Afghanistan, a major bone of contention between Islamabad and Kabul. Pakistanis have a fundamental doctrinal disjuncture with whats happening because they are ... geared to dealing with India while they are facing marauders from the west, said Juan Zarate, a former deputy national security adviser in the Bush administration. With Taliban fighters moving closer to Islamabad, Admiral Michael Mullen told a Navy League conference on Monday he was increasingly concerned about the country. Over the past year there has been a gradual erosion and increase in the terrorist threat there, said Mullen, the chairman of the Joint Chiefs of Staff. As it seeks reliable allies in the region, the United States, which has funnelled $10 billion in aid to Islamabad over the past eight years, can sometimes give conflicting signals. At times it has praised Pakistans military and at others accused it and its powerful spy agency of helping al Qaeda. Some have raised concern that elements within the Pakistani military and intelligence services may be sympathetic to militant groups, leading to caution on our part, Obamas undersecretary of defence for policy, Michele Flournoy, told the House of Representatives Armed Services Committee last week. Obama is calling for additional $1.5 billion in spending annually for five years to boost civilian development in Pakistan as part of his strategy for the region. While requesting huge boosts in assistance for Pakistan, the US administration has sounded increasingly frustrated with the civilian government. Secretary of State Hillary Clinton has accused Islamabad of abdicating to the Taliban by agreeing to impose Sharia law in the Swat valley and Obama has expressed concern the government is very fragile and unable to deliver basic services. As he seeks to wind down the war in Iraq, Obamas strategy for Afghanistan and Pakistan has won some praise for its focus on boosting aid and development and not relying entirely on a military solution to the fight against al Qaeda. Today the war is being lost in Afghanistan, but is not yet lost, Bruce Riedel, an author of Obamas strategy, wrote in a piece for the Brookings Institution last week. President Obama has decided to send the resources to the war to break the movement of the Taliban. He is right to do so. But some argue it does not go far enough to change past policies that have failed to yield results.