National security adviser Jake Sullivan met with Ukraine’s President Volodymyr Zelenskyy in Kyiv on Wednesday to reaffirm U.S. support for the beleaguered country as congressional aid efforts have repeatedly floundered.us polictics news National security adviser Jake Sullivan met with Ukraine’s President Volodymyr Zelenskyy in Kyiv on Wednesday to reaffirm U.S. support for the beleaguered country as congressional aid efforts have repeatedly floundered.