Since Kyiv and its European backers panned a 28-point US proposal for a deal to end Russia’s invasion of Ukraine, warning that it was skewed in Moscow’s favor, Ukraine and the United States have been trying to hash out a revised blueprint known as the 20-point plan. Following a meeting with Ukrainian President Volodymyr Zelenskyy in Florida on December 28 -- bookended by phone calls with Russian President Vladimir Putin -- US President Donald Trump said that after nearly four years of full-scale war and inconclusive Russia-Ukraine talks…