KYIV — Ukraine is undergoing its largest government shake-up since Russia invaded the country in 2022, as the war reaches a critical juncture and President Volodymyr Zelensky prepares to visit the United States to unveil a “victory plan” on how Kyiv hopes to win.

       The visit later this month comes as Ukraine is preparing for various scenarios ahead of a U.S. presidential election in November that could affect the future of a key partnership that has, until now, ensured Ukraine’s defense. It also coincides with renewed pleas from Kyiv for Western allies — including Washington — to lift restrictions on using certain weapons for long-range strikes inside of Russia in hopes of curbing its devastating missile strikes across the country.