United States President Joe Biden has made unceasing support for Ukraine during Russia’s invasion a hallmark of his one-term presidency, using his office to funnel weapons and aid to Kyiv while wrangling Congress to keep the US purse strings loose.
But one issue has remained a key sticking point: Biden has refused to allow Ukraine to use US-provided, long-range Army Tactical Missile Systems (ATACMS) inside Russian territory amid warnings from Moscow that their use would represent the crossing of a red line.
