Why Joe Biden is so invested in defending Good Friday agreement

Analysis: Northern Ireland is a rare issue of bipartisan consensus and a pillar of US foreign policy

Joe Biden's commitment to defending the Good Friday agreement is baked into his political history and identity. But it is also a pillar of US foreign policy, a rare issue of bipartisan consensus in an otherwise hyper-polarised political scene, one of the few stances Biden can take on the world stage without drawing fire from Republicans.

Biden's emotional attachment to Ireland has been a constant throughout his adult life and has become part of his political identity too. He routinely refers to his mother's family history and his ties to County Mayo. He quotes Irish poets, and uses the example of British rule in Ireland as a bridge to empathise with persecuted minorities.