Britain's Conservative MP Rory Stewart launches his campaign to become leader of the Conservative and Unionist Party and Prime Minister at the Underbelly Festival on the south bank of the River Thames, central London. Tuesday June 11, 2019. A longshot candidate, International Development Secretary Stewart has seen his profile soar with a savvy campaign that saw him travelling the country talking to voters, and producing endearingly amateurish social media videos. (Isabel Infantes/PA via AP)