Ukrainian President Volodymyr Zelensky's visit to the United States appears unlikely to convince the White House to provide Kyiv with the weapons it needs to retake more of its territory from Russia. On Dec. 21, Zelensky made his first foreign visit since Russia invaded his country on Feb. 24 -- arriving in Washington for talks with U.S. President Joe Biden and top U.S. officials, followed by an address to a joint meeting of the U.S. Congress. The visit coincided with the announcement of a new U.S. package of $1.85 billion in additional security assistance for Ukraine that includes one Patriot anti-air defense system (details on the model and munitions for which were not disclosed). The visit comes at a pivotal moment, with Ukrainian forces making gains on the battlefield in recent months. But Ukraine lacks the long-range strike capability and other offensive equipment it needs to maintain its momentum against...