Powell

Based on the provided articles, "Powell" is the former chair of the Federal Reserve. He is newsworthy because, according to one article, former President Trump named Kevin Warsh as the next Fed chair, replacing Powell. The articles do not provide further details about Powell's background, tenure, or current activities. His relevance stems from his previous role as Fed chair and the implication that a change in leadership at the Federal Reserve is a significant economic event. The other article is unrelated, focusing on Trump's stance on Iran.