In 2010, Duncan attempted once again to become Dumfries and Galloway's MP. However the election produced a swing against the Conservatives in the seat, and it was held by Labour's Russell Brown with a majority of 7,449 votes. The SNP's share of the vote in the constituency collapsed at the 2005 general election, and remained static in 2010. In 2015, the seat was won by the SNP's Richard Arkless with a 6,514 vote majority. The Conservative share of the vote stayed similar to the 2010 election, whereas Labour polled third, receiving 24.7% of the vote compared to 45.9% in 2010. In 2017, Alister Jack gained the seat for the Conservatives, making him one of a dozen new Scottish Conservative MPs. Jack held the seat in 2019 with a reduced majority despite increasing his vote share.