The Scottish Democratic Alliance (SDA) was a political organisation formed in 2009 as the successor to the Scottish Enterprise Party (SEP). It supports Scottish independence and withdrawal from the European Union. Although it evolved from a political party, the SDA spent some time operating as a think tank on current affairs in Scotland. It stood its first candidate for election in the 2013 Aberdeen Donside by-election, coming last with 35 votes (0.1%).