Flush with recent battlefield successes, Ukrainian officials are pressing their case for acquiring longer-range missiles to strike deeper into Russian-held territory, including Crimea, raising questions about how aggressively the Biden administration will support Kyiv’s war aims. U.S. officials have urged Ukraine to focus on its battles in the eastern and southern part of the country, particularly around Kharkiv and Kherson , where it has made its largest gains since Russia’s Feb. 24 invasion. Meanwhile, Ukrainian officials are reviving their pleas for more weaponry, including advanced systems like the U.S. Army Tactical Missile System, or ATACMS, congressional and U.S. officials said.