The Christian right characterized his testimony as supporting a "loosening regulations". However, the White House said that Holsinger's concerns only involved the severity of the penalties. In 2005, he argued against a Kentucky anti-cloning bill, warning it could restrict future research. Holsinger testified that his father died of Parkinson's disease which is under investigation for gene therapy. During the HELP hearing, Holsinger said he supported President Bush's stem cell policy, which restricts federal funding to already existing embryonic cell lines while providing funds for adult and animal stem cell research.