Michael J. Fox has visited Washington, DC, to continue his campaign to lift United States President George W. Bush's restrictions on embryonic stem cell research.

Fox, a tireless campaigner who suffers from Parkinson's Disease, spoke at a Capitol Hill news conference, in the hopes that a change could be made. He said, "Embryonic stem cell research holds enormous promise. More federal funding and more lines are needed or progress will stall."

Stem cell research on human embryos holds the most promise in the search for cures such as Alzheimer's, Parkinson's, diabetes and some types of cancer. The Senate is considering a House-passed bill to lift Bush's 2001 restrictions on federal funding for such studies, but the measure is facing stiff resistance from conservatives who believe the process is unethical because it destroys embryos.

Dana Reeve, widow of Christopher Reeve, was expected to appear with Fox today but had to cancel for family reasons. Her husband's spinal cord injury is one condition for which embryonic stem cell research holds the promise of a cure.