British Prime Minister Keir Starmer announced his resignation Monday, after numerous Labour members of Parliament called for him to step down. “Every decision I’ve taken has been about putting the country I love first,” Starmer said. “That is why I will resign as leader of the Labour Party.”Starmer’s successor will be Great Britain’s seventh prime minister in only 10 years, the same year the country voted to leave the European Union. Prime Ministers since BrexitDate Sworn inDays in OfficeDavid CameronMay 8, 2015 (second term)429 days (during second term)Theresa MayJuly 13, 20161,106 daysBoris JohnsonJuly 24, 20191,140 daysLiz TrussSept. 6, 202249 daysRishi...