The Year Ahead/Hot Seat

Three Leaders on the Hot Seat in 2018

The CEO of Ryanair, New Zealand’s prime minister, and U.S. Senate Majority Leader Mitch McConnell.

Jacinda Ardern, New Zealand prime minister

The South Pacific nation’s youngest prime minister since 1856, Ardern, 37, heads a cabinet heavy on neophytes with little governing experience. Delivering on her promise of economic reform will be a challenge, not least because her Labour Party must rule in partnership with two other parties.