[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/04/17/art.gordonbrown.jpg caption="British Prime Minister Gordon Brown arrives at Andrews Air Force Base Wednesday."]
WASHINGTON (CNN) - The three White House hopefuls each sat down for a one-on-one meeting with British Prime Minister Gordon Brown on Thursday.
Brown, who is on his second trip to the United States since replacing Tony Blair last June, held private 45-minute sessions with each of the candidates at the British Embassy in Washington.
Sen. Hillary Clinton and the British leader discussed a wide range of issues, including the wars in Iraq and Afghanistan and global warming, according to Senate aides.
Sen. Barack Obama, the only candidate meeting with Brown for the first time, had planned to discuss the United States' relationship with the United Kingdom as well as his plans to reenergize the Trans-Atlantic alliance, according to his campaign.
Brown and Sen. John McCain, who most recently met last month in London, were heard talking about the presidential election as they walked together for their photo op, with McCain saying that the drawn-out process sometimes made one wish for the quicker British system.
Brown laughed, saying their systems has its ups and downs.
Following his meeting with the candidates, Brown was scheduled to meet with President Bush to talk about the global economy.