Carlaw joined the East Renfrewshire Conservatives in 1978. He was the Conservative candidate in the
1982 Queen's Park by-election, and in the
1983 general election in
Glasgow Pollok. He was Chairman of the
Scottish Young Conservatives from 1984 to 1986, Chairman of Eastwood Conservatives from 1988 to 1992, and was Deputy Chairman of the
Scottish Conservatives from 1992 to 1998. He was reappointed Deputy Chairman of the Scottish Conservatives in 2005. In the run-up to the
1997 Scottish devolution referendum Carlaw campaigned against the formation of a devolved Scottish Parliament alongside the Scottish Conservatives and the
Think Twice campaign, advocating a No vote for both the question of the parliament's formation and whether the parliament should be granted tax-varying powers. Carlaw was unsuccessful as a candidate for
Eastwood in the
2003,
2007, and
2011 Scottish Parliament elections. He was, however, elected on the party list under Scotland's
additional member system in 2007 and 2011, representing the
West of Scotland region. He sat on the Culture, Tourism, Europe and External Relations Committee of the Scottish Parliament until mid-2018. In 2011, Carlaw stood as a candidate in the
leadership election brought on by
Annabel Goldie's resignation. During the campaign, he was hospitalised with
appendicitis. Carlaw finished third behind
Ruth Davidson and
Murdo Fraser. He was appointed as Deputy Leader of the Scottish Conservative Party and
Scottish Conservative Spokesperson for Health and Sport by Davidson following her victory. Carlaw became MSP for Eastwood in 2016, after defeating the incumbent
Ken Macintosh. He was re-appointed as of 28 June 2017 as
Shadow Cabinet Secretary for Europe and External Affairs and
Shadow Cabinet Secretary for Culture and Tourism. He supported
remain during the
2016 EU referendum. In February 2017, Carlaw was appointed Deputy Convener of the Cross Party Group on End-of-life Choices. Following an attempt in March 2017 by the SNP to hold a
second Scottish independence referendum, Carlaw spoke against the attempt, describing it as "pointless" and unwanted". He pledged the Scottish Conservatives would not allow for a further referendum until the Scottish public showed clear support. == Leader of the Scottish Conservatives ==