[1] In October 2009, Azopardi published a book "Sovereignty and the Stateless Nation: Gibraltar in the Modern Legal Context" (Hart Publishing ISBN 978-1-84113-916-6) discussing the constitutional status of Gibraltar, and proposing ways forward to achieve an enduring settlement to the dispute with Spain.

[1][2] In July 2017, he rejoined with the GSD and has represented himself as candidate for 2017 Gibraltar Social Democrats leadership election, opposing Roy Clinton.

[citation needed] Azopardi led the party into the 2019 election, focusing on the theme of "The Gibraltar You Deserve" but ultimately was defeated by the incumbent GSLP-Liberals under the leadership of chief minister Fabian Picardo who won a third term in office.

He took the party into the 2023 election, and polling throughout the campaign showed the GSD narrowly ahead and at times statistically tied with the GSLP-Liberals.

Despite the GBC exit poll[4] on election night suggesting an incredibly narrow victory for the party with Keith Azopardi expected to become chief minister, ultimately once the votes had been counted the party fell short of government and Fabian Picardo and the GSLP-Liberals won a fourth consecutive term in office.