Following the decision of sitting MP
Alister Jack not to seek re-election in 2024, Cooper—who had served as Jack's special adviser on media relations—was selected as the Scottish Conservative Party candidate for
Dumfries and Galloway. He successfully held the seat for the Conservatives in the 2024 general election, maintaining a majority of 930 votes. In Westminster, Cooper has focused on economic and industrial policy. On 21 October 2024, he was elected to the
Business and Trade Select Committee, and in March 2025, he was further appointed to the Sub-Committee on Economic Security, Arms and Export Controls. Throughout 2025 and early 2026, his parliamentary work has been defined by advocacy for South Scotland infrastructure, specifically regarding the
A75 and
A77 road corridors. == Personal life ==