After the resignation of Liz Truss last week, the governing party is choosing Britain’s third prime minister this year at a time of political turmoil and severe economic challenges.
Sunak, 42, is the only candidate with confirmed support from more than 100 lawmakers, the number needed to run in the election. House of Commons Leader Penny Mordaunt has far fewer expressions of support, but is aiming to reach the threshold by the time nominations close at 2 p.m.
If Mordaunt does not reach 100 nominations, Sunak will win by acclamation and could move into 10 Downing St. by Monday evening.
If both make the ballot, the 357 Conservative lawmakers will hold an indicative vote on Monday to show their preference. If neither subsequently drops out, the choice will go to the 172,000 party members around the country, with a result announced Friday.
Mordaunt will come under intense pressure to step aside and not force a membership vote if Sunak is the strong favorite among lawmakers.