Liz Truss, UK foreign secretary, applies for prime minister

“I move forward because I can lead, deliver and make tough decisions. I have a clear vision of where we need to be and the experience and determination to get us there,” Truss wrote.

Here's a look at who could replace Boris Johnson as UK Prime Minister.

At the forefront of her proposal is a promise to cut taxes. “Under my leadership, I would start cutting taxes from day one to take immediate action to help people cope with the cost of living,” she wrote.

Truss held several positions in the Cabinet, including Minister of Foreign Affairs. She was also the main negotiator with the European Union for the UK’s Brexit deal.

In his article, Truss emphasizes his experience in foreign policy in addition to his domestic experience.

“As Minister of Foreign Affairs, I helped lead the international response to Putin’s war in Ukraine and imposed a tough package of sanctions that led the world, causing real pain to Putin and the Kremlin,” she wrote.

Truss is part of an increasingly crowded field vying to replace Johnson. Other candidates include Chancellor of the Exchequer Nadheem Zahavi, Transportation Secretary Grant Shapps, former Chancellor Rishi Sunak, senior Conservative spokesman Tom Tugendhat, Attorney General Suella Braverman, former Equality Minister Kemi Badenok, former Foreign Secretary Jeremy Hunt, former Health Minister Sajid Javid and Secretary of Commerce Penny Mordaunt.

As CNN previously reported, candidates who run for leader will go through rounds of voting by Conservative lawmakers until only two remain, after which Tory members across the country vote. The winner will be the new party leader and prime minister.