It has been more than six years since President Bush, in the first major televised address of his presidency, drew a stark moral line against the destruction of human embryos in medical research.
Since then, he has steadfastly maintained that scientists would come up with an alternative method of developing embryonic stem cells, one that did not involve killing embryos.
Critics were skeptical. But now that scientists in Japan and Wisconsin have apparently achieved what Mr. Bush envisioned, the White House is saying, ''I told you so.''
Conservative Republican presidential hopefuls like former Gov. Mitt Romney of Massachusetts are breathing a sigh of relief. And opponents of embryonic stem cell research are congratulating themselves.
The discovery that skin cells can be reprogrammed to mimic embryonic stem cells is likely to transform the sticky political debate over the science, a debate that has pitted Mr. Bush against two-thirds of the American public including prominent Republicans like Nancy Reagan and has even helped decide some elections.
The findings have put people on both sides of the stem cell divide on nearly equal...
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