Some supporters of Cornish self-government question the legitimacy of English rule in Cornwall, due to the failure of the former Parliament of England to ever pass an Act of Union, although their claims are not generally recognised within the United Kingdom (or sometimes within Cornwall itself). However, many see some degree of autonomy as a stepping stone towards this, and are supportive of the Cornish Assembly Campaign. The Cornish National Party (CNP) is a social democratic political party in Cornwall to which some Cornish nationalists belong. It wants Cornish independence from the United Kingdom.