The Senate Banking Committee voted on party lines to approve Kevin Warsh as the next chair of the Federal Reserve, to replace Jerome Powell, a longtime target of President Donald Trump’s insults for not cutting borrowing costs as far as the president wanted. Warsh is a former top Fed official but has also been a sharp critic of the institution and Powell’s leadership. A vote on his nomination probably won’t take place until next month, but he could be confirmed by the time Powell’s term as chair ends May 15.