British Prime Minister Keir Starmer resigned after only two years in office, unable to deliver promised change.

His downfall reflects a broader challenge facing western democracies, where leaders struggle to fulfill campaign promises once in power.

Andy Burnham is likely to become Britain's next prime minister, facing the same challenges that toppled his predecessor.

AI-generated summary was reviewed by a CNN editor.

British Prime Minister Keir Starmer was felled by a curse haunting most western leaders — a failure to deliver change to voters who’ve lost trust in the capacity of modern politics to make their lives better and more affordable.