"NATO's Unity Tested as Biden Faces Complications at Summit"

President Joe Biden's upcoming trip to Europe, including the NATO summit in Lithuania, is seen as a crucial diplomatic opportunity to strengthen international alliances and support Ukraine in its defense against Russia. Biden will urge for increased Western support for Ukraine and emphasize the success of NATO's response to Russian aggression. However, there are concerns about the sustainability of supporting Ukraine and divisions within the alliance regarding Ukraine's potential NATO membership. Biden's visit will also include stops in London and Helsinki, where he will highlight his leadership on the world stage and contrast with the GOP primary field.