Preseli Pembrokeshire (Welsh: Preseli Sir Benfro) is a constituency of the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election. The Preseli Pembrokeshire Welsh Assembly constituency was created with the same boundaries in 1999. The present MP, since 2005, is the Conservative Stephen Crabb, who has been Secretary Of State for Work and Pensions since March 2016, The seat was a Labour-Conservative marginal from its creation in 1997 until the 2010 general election.