WASHINGTON (Agencies) US President Barack Obama is considering a proposal to further boost the size of Afghanistan security forces as a way to speed up the withdrawal of US troops, a senior Democratic lawmaker said Tuesday. The lawmaker suggested that Pakistan, a US ally and major recipient of American aid, may oppose the increase by its next-door neighbour, reported CNN. Sen Carl Levin, D-Michigan, Chairman of the Senate Armed Services Committee, said he talked briefly to President Obama about it. "The words that I got was 'It is under consideration," Levin said, adding that he thought it would be decided "in the next few days". Levin said he and his fellow lawmakers on the trip, Sen Jack Reed, D-Rhode Island, and Sen Jon Tester, D-Montana, wanted the Afghan army and police increased by an additional 78,000. Levin suggested that Pakistan may oppose the increase by its next-door neighbour. "I think there may be an issue with Pakistan not wanting to see a larger Afghan army," Levin said during a news conference at the US Capitol. He said Pakistani leaders had long insisted that Afgh-anistan do more to stop insurgents crossing their shared border. "They can't have it both ways," Levin said. "If they want the Afghans to take greater responsibility on their side of the border to stop the flow then they should not object to the Afghan security forces being enlarged." A spokesman for the Pakistani Embassy in Washington would not say directly if his country would oppose a build-up of Afghan troops. However, the spokesman, who insisted on anonymity, said it is the sovereign right of Afghanistan to determine the size of its army and policy. And the spokesman said Pakistan offers its cooperation in helping to bring peace and stability to neighbouring countries. Pentagon spokesman Col Dave Lapan had no comment on the suggestion that Pakistan is opposing the increase.