In meetings with Afghan President Hamid Karzai, including a 2006 session with former US Ambassador to Afghanistan, Ronald E. Neumann, the CIA's station chief and their British counterparts, American officials talked about the rumors in hopes that the president might move his brother out of the country, said several people who took part in or were briefed on the talks. "We thought the concern expressed to Karzai might be enough to get him out of there," one official said. President Karzai has resisted, however, demanding clear-cut evidence of wrongdoing, several officials said. "We don't have the kind of hard, direct evidence that you could take to get a criminal indictment," a White House official said. Ahmed Wali Karzai dismissed the allegations as politically motivated attacks by longtime rival groups in his country.