Last week, the director of the National Institute of Neurological Disorders and Stroke at the NIH told Congress that the US government's limits on stem cell research mean that scientists are "missing out on possible breakthroughs." Story Landis, NINDS director, was asked by Sen. Edward Kennedy (D-Mass.) to tell the Senate what impact President George W. Bush's funding restrictions have had, according to this article from Yahoo! News.
The Senate is slated to vote on the bill soon, and if it is passed it is widely expected to be vetoed for a second time by Bush.