President George W. Bush on Wednesday vetoed legislation to expand federally funded embryonic stem cell research, triggering an uphill battle in the Democratic-led Congress to override him.
Two-thirds majority votes would be needed in the Senate and House of Representatives to overcome Bush’s opposition and make the bill law, and backers conceded they are short of support.
In addition to vetoing such legislation for the second time in two years, Bush issued an executive order to encourage scientists to work with the federal government to derive new methods to obtain stem cells without harming human embryos.