Labour’s Andy Burnham, the popular mayor of Greater Manchester, won a special election for a seat in Parliament and signaled Friday that he will use it to challenge embattled Prime Minister Keir Starmer for leadership of the country.

Burnham's career has taken him parliament to the mayor's office in Greater Manchester and back again. Now, he faces his greatest political test.

Labour’s Andy Burnham has won a special election for a seat in Parliament, positioning him to challenge Prime Minister Keir Starmer.