Kamala Harris and the future of the Democrats

Joe Biden’s running mate embodies the progressive trend of the party
The elevation of Kamala Harris as Joe Biden’s presidential  campaign running mate reinforces the progressive trend of the Democratic party
The elevation of Kamala Harris as Joe Biden’s presidential campaign running mate reinforces the progressive trend of the Democratic party © Olivier Douliery/AFP/Getty

For a US presidential candidate, the choice of running mate is often nakedly political. Who will clinch a swing state or put an unpromising one into contention? Who will please a wing of the party that remains cool on the main name? For Joe Biden, the test was more substantive. At 77, he needed someone who could share the burdens of office and, in extremis, replace him.