Ukrainian Defense Minister Oleksii Reznikov submitted a letter of resignation Monday after President Volodymyr Zelenskyy said he would be replaced and named his successor. Mariia Shuvalova discusses why she believes Ukraine needs a new defense minister. #Ukraine #WarinUkraine #defenseminister Get a fast-paced look at the latest from the border to Main Street to the White House on "NewsNation Live with Marni Hughes." Weekdays starting at 10a/9C.#NewsNationLive NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij