Former US Secretary of State John Kerry has told the BBC his fellow Democrats allowed the US-Mexico border to be "under siege" during Joe Biden's presidency.In sometimes sharp words, Kerry - who was the Democratic presidential nominee in 2004 and a US senator from Massachusetts - said he told Biden the party had "missed" on the issue of immigration for years,

Leaders from both economies had been trying to negotiate more favorable terms, only to have those efforts blown up by form letters.