Leaders from the Group of Seven nations are set to hold a virtual meeting Thursday at which they are expected to condemn Russia’s aggression in Ukraine and discuss robust sanctions against Moscow. The meeting will enable the G-7 leaders to coordinate their responses and urge Russia to prevent a further escalation of the crisis that has already jolted financial markets and posed a challenge to the post-Cold War architecture. G-7 members, including this year’s president Germany, had sought to persuade Russian President Vladimir Putin to find a diplomatic solution to the crisis as Russia earlier …