For many, the involvement of the U.S. is a strong and positive factor in keeping the peace.
Biden has been encouraged by the latest post-Brexit deal agreed in February between the UK and EU.
The American president cannot solve the current impasse single-handedly. But U.S. economic heft can help.
Biden cares deeply about Northern Ireland and fears that Truss’ approach is jeopardizing the peace process.
Biden makes no secret of his sympathies.
Despite the multiple uncertainties ahead, Johnson is likely to seek to play the role of a trusted, albeit candid, friend to Biden in a bid to get close to him and try to make the relationship as smooth as possible.