President Biden will travel to Belgium and Poland this week, seeking to hold together a Western alliance that is beginning to show potential cracks and making a symbolic appearance in a country whose leaders fear it could be a future target of Russian aggression.

Biden will land in Brussels on Wednesday night, as the Russian invasion of Ukraine approaches the one-month mark with no sign of letting up.

As the war grinds on and Ukrainian leaders plead for additional assistance, divisions are emerging between allies who want to supply offensive weapons such as fighter jets and others who are wary of escalating the confrontation with Moscow.