By Steve Holland, Dan Peleschuk and Olena Harmash WASHINGTON/KYIV (Reuters) -U.S. lawmakers were expected to approve a $45 billion aid package for Ukraine on Friday, as President Volodymyr Zelenskiy returned from Washington with the promise of Patriot missiles to help fend off Russia’s invasion. The military and economic assistance, part of a wider government spending bill, follows U.S. aid worth around $50 billion sent to Ukraine this year as well sanctions imposed on Russia by the West that now include a cap on Russian oil prices. Russia responded to the cap on Friday by threatening to cut o…