GORDON BROWN

AGE: 56
OCCUPATION: Chancellor of the Exchequer, United Kingdom
NUMBER OF TIME COVERS: 0
PREVIOUS APPEARANCES ON THE TIME 100: 1

PRO: Most likely successor to Tony Blair for leadership of the Labor Party, which would make him Prime Minister. He is widely regarded the second most powerful politician in the UK.

CON: His leadership will not go unchallenged within the party, especially since polls suggest he is highly unpopular, and his taking the helm could cost his party the election. Has been accused of having a "Stalinist" style of management.