In 2010, Mundell was re-elected, with an increased majority. In 2015, after the SNP landslide victory in Scotland, he narrowly defeated the SNP candidate, Emma Harper by 798 votes, and was the only Scottish Conservative MP elected. However, following the SNP's losses at the 2017 snap general election, the Conservatives gained 12 seats in Scotland, with Mundell increasing his majority to 9,441 votes. Mundell was re-elected at the 2019 general election, but with a reduced majority, in an election where the SNP made gains across Scotland at the expense of Labour and the Conservatives.