As Republicans gathered for their convention this weekend, Governor Jim Doyle and Democrats touted their support for embryonic stem cell research.
The issue divides Republicans. Some social conservatives question the research because days-old human embryos get destroyed in the process. Others believe the stem cells may unlock the cures to diseases such as diabetes and Parkinson's.
The governor is making the issue a central part of his administration and re-election campaign.
Doyle's opponent, Congressman Mark Green says he supported President Bush's 2001 restrictions on the science.
Doyle and scientists say the restrictions have held back the field's progress.
But Green says he believes ethics must figure into all research.