Britain has seldom been friendly to second acts in life, particularly from politicians, but it is witnessing two very remarkable ones at the moment.
In 2010, David Cameron and Nick Clegg were the look-alike wunderkinds of British politics: At 43, Cameron, from the Conservative Party, was the youngest prime minister since Lord Liverpool in 1812; and Clegg, born a year after Cameron, was the first member of the Liberal family (his party, the Liberal Democrats, had its roots in the old Liberal Party) to get near real power since the fall of David Lloyd George in 1922.
Then everything fell apart. Cameron lost the 2016 referendum on the United Kingdom's membership to the European Union — a vote he had foolishly called to solve a problem of internal party discipline — and left Downing Street in disgrace, with the British pound crashing and the country in turmoil.