( CNN ) -- Secretary of State John Kerry made an unannounced visit to Afghanistan on Thursday where he plans to encourage a resolution to the presidential election that the United States insists must include a thorough review of `` reasonable allegations '' of fraud . Kerry plans to meet in Kabul with presidential candidates Abdullah Abdullah and Ashraf Ghani as well as the man one of them will succeed , President Hamid Karzai , to discuss the political transition amid uncertainty over the vote earlier this month . `` While the United States does not support an individual candidate , we do support a credible , transparent and inclusive process that affirms the Afghan people 's commitment to democracy , and that produces a president who can bring Afghanistan together and govern effectively , '' the State Department said in a statement detailing Kerry 's surprise visit . About 8 million votes were cast in June 14 balloting and provisional results showed Ghani ahead with roughly 56 % support to 43 % for Abdullah , according to Afghanistan 's Independent Elections Commission . Final results will be announced July 22 . Abdullah alleged massive fraud in an interview with CNN this week , while Ghani has said the results were `` legitimate and credible . '' The Obama administration is looking for a credible outcome involving one candidate or the other , and U.N. officials say sorting out the situation could take a couple of weeks . The inauguration is set for the first week of August . The United States is withdrawing most of its troops by year 's end , reducing the primary leverage it has had in Afghanistan . But it still supports the country with billions in foreign aid . Although once an ally of Karzai , Abdullah has in recent years become an opponent and vocal critic of the Taliban . Ghani , also a former adviser to Karzai and finance minister , was once a U.S. citizen , but gave up his passport to run for president five years ago . CNN 's Jamie Crawford and Mick Kreve contributed to this report .
Kerry made unannounced stop in Kabul . He will meet with both candidates in election still not finalized . The United States wants a thorough review of legitimate Afghan claims .