The call came a day after Russia launched a large-scale attack on Ukraine's energy grid, knocking out power to parts of the capital Kyiv and nine other Ukrainian regions. Diplomatic efforts to end Russia's invasion of Ukraine have slowed in recent months, in part because global attention shifted to Israel's two-year war with militant Palestinian group Hamas, Kyiv says. Trump, who announced the first phase of a ceasefire deal between Israel and Hamas on Wednesday, met Russian President Vladimir Putin for talks in August but failed to extract any kind of peace deal. "I had a call with US President Donald Trump. A very positive and productive one," Zelensky said on Facebook, congratulating Trump for his "outstanding" ceasefire plan in...