Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. New British PM to Visit Obama at White House Jennifer Glasse 20 July 2010 Britain's PM David Cameron leaves Downing Street to attend the weekly Prime Ministers Questions in the Houses of Parliament in London (File Photo) Photo: AP Britain's PM David Cameron leaves Downing Street to attend the weekly Prime Ministers Questions in the Houses of Parliament in London (File Photo) White House officials say Afghanistan will top the agenda when British Prime Minister David Cameron makes his first visit to Washington Tuesday. Spokesman Robert Gibbs said Monday that Mr. Cameron and President Barack Obama will discuss the issues they spoke about during last month's G20 summit in Toronto - Afghanistan being "first and foremost." Mr. Cameron has said he would like to see British troops out of Afghanistan by no later than 2015. President Obama has set a July 2011 deadline to begin withdrawing U.S. troops from Afghanistan, but he is stressing the process will be gradual. Both leaders say they are giving the Afghan government time to build its own security forces. White House officials also say allegations of BP's involvement in freeing the Lockerbie bomber will likely come up in Tuesday's talks. Prime Minister Cameron plans to meet with four U.S. senators (Democrats Kirsten Gillibrand, Frank Lautenberg, Robert Menendez, and Charles Schumer) at the British embassy in Washington Tuesday. Senators from the states of New York and New Jersey allege BP may have lobbied the British government to free the bomber to help secure a $900 million offshore oil drilling deal with Libya. Scotland freed Abdel Basset al-Megrahi last year on humanitarian grounds after doctors said he had cancer and only months to live. But he is still alive and living in Libya. Mr. Cameron has called the release of Megrahi a mistake. British-based BP denies it had anything to do with Megrahi's release. BP is already under fire in the U.S. concerning the Gulf of Mexico oil spill. Last week, the four lawmakers from New York and New Jersey demanded an investigation, writing in a letter to Secretary of State Hillary Clinton that the Gulf of Mexico oil spill shows that BP would "put profits ahead of people." On Monday, Secretary Clinton called on British and Scottish authorities to review the circumstances leading up to the bomber's freedom. Megrahi, a former Libyan intelligence agent, is the only suspect convicted for the 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland, killing 270 people. Some information for this report was provided by AP and Reuters. .