The acting US ambassador to Kyiv Julie Davis will step down from her post and retire, a US official and the State Department said on Tuesday, amid a lull in US-brokered talks to achieve a ceasefire and end Russia’s invasion of Ukraine.The Financial Times first reported Davis’ departure and said it was because of differences of opinion with President Donald Trump’s policies and that Davis had grown frustrated with her role over his dwindling support for Ukraine.The State Department pushed...