Western leaders provided further assurances of support for Kiev on Sunday, the latest in a string of efforts by world leaders to de-escalate the conflict amid fears that Moscow may be planning to invade Ukraine in the near future. At the same time, a growing number of governments advised their citizens to leave Ukraine as soon as possible. US President Joe Biden was among a series of leaders to assure Ukrainian President Volodymyr Zelensky of their support. Biden told Zelenksy that the US remained committed to Ukraine’s sovereignty and territorial integrity in a phone call on Sunday evening. A…