David has had an interest in politics since the early 1970s when, as a member of Young Labor, he worked on the It's Time campaign to help end military conscription. The following decade he joined the Liberal Party in an effort to promote economic freedom. He joined the Shooters Party in 1992, became the party's Chairman in 1999 and managed the successful 2003 campaign that retained the party's NSW Legislative Council seat. He joined the Liberal Democrats in 2005 and managed the party’s federal election campaigns in 2007, 2010, 2013 and 2016. He has a classical liberal outlook, favouring individual choice and freedom over government intrusion. David is married and owns an agribusiness consulting company in Sydney. A former veterinarian, he also has degrees in business and law. His sporting interest is target shooting. David was elected to the Senate in September 2013 and commenced his term in July 2014. He was re-elected for a three year term in July 2016. As a senator he has been a principled advocate for smaller government, lower taxes, a balanced budget and an end to the nanny state.