did not prosper (partly due to its unfavourable distribution of votes by the First-Past-the-Post electoral system), and was accused by some of splitting the Labour vote. The SDP eventually merged with the Liberal Party to form the Liberal Democrats in 1988. The Labour Party was defeated in a landslide at the 1983 general election, and Michael Foot was replaced shortly thereafter by Neil Kinnock as party leader. Kinnock progressively expelled members of Militant, a left-wing group which practised entryism, and moderated many of the party's policies. Despite these changes, as well as electoral gains and also due to Kinnock's negative media image, Labour was defeated at the 1987 and 1992 general elections, and he was succeeded by Shadow Chancellor of the Exchequer, John Smith. Shadow Home Secretary Tony Blair became Leader of the Labour Party following Smith's sudden death from a heart attack in 1994. He continued to move the Labour Party towards the "centre" by loosening links with the unions and continuing many of Thatcher's neoliberal policies. This, coupled with the professionalising of the party machine's approach to the media, helped Labour win a historic landslide at the 1997 general election, after eighteen consecutive years of Conservative rule. Some observers say the Labour Party had by then morphed from a democratic socialist party to a social democratic party, a process which delivered three general election victories but alienated some of its core base; leading to the formation of the Socialist Labour Party. A subset of Labour MPs stand as joint Labour and Co-operative candidates due to a long-standing electoral alliance between the Labour Party and the Co-operative Party - the political arm of the British co-operative movement. At the 2019 general election, 26 were elected. Scottish National Party The Scottish National Party won the third-largest number of seats in the House of Commons at the 2015 general election, winning 56 MPs from the 59 constituencies in Scotland having won 50% of the popular vote. This was an increase of 50 MPs on the result achieved in 2010. At the 2017 general election, the SNP won 35 seats, a net loss of 21 seats. At the 2019 general election, the SNP won 48 seats, a net gain of 13 seats. The SNP has enjoyed parliamentary representation continuously since 1967. Following the 2007 Scottish parliamentary elections, the SNP emerged as the largest party with 47 MSPs and formed a minority government