21.   His leverage to use similar executive powers to block similar cloning research is more limited because much of that work is already privately financed.

22.   If lawmakers refuse to do so, Brownback said, he will press for a six-month moratorium that would temporarily ban the cloning research.

23.   Its members believe that while cloning research raises ethical dilemmas, it should be allowed to continue.

24.   It would require cloning research experiments to be approved by hospital or university ethics committees.

25.   Other legal experts asked whether Congress had the authority to ban cloning research and whether such a ban would be constitutional.

26.   Pitts requested the investigation to determine whether the company was using taxpayer money from the National Institutes of Health to support its cloning research.

27.   Reeve has asked Congress to allow cloning research to go forward because it might help people with spinal cord injuries.

28.   Senator Sam Brownback, Republican of Kansas, appealed for a six-month moratorium on cloning research while Congress considers the issue more thoroughly.

29.   Some critics warn that the state-by-state approach will create havens for cloning research unless Congress intervenes.

30.   Summers recommended that Congress ban reproductive cloning but allow therapeutic cloning research.