front runner
US /ˈfrʌnt ˌrʌn.ər/
UK /ˈfrʌnt ˌrʌn.ər/

1.
favorito, líder
the person, animal, or organization that is most likely to win a race or competition
:
•
The candidate is currently the front runner in the polls.
O candidato é atualmente o favorito nas pesquisas.
•
Our team is the front runner for the championship this year.
Nossa equipe é a favorita para o campeonato este ano.