U.S. President Donald Trump said on Tuesday he will decide on a nominee to fill a coming vacancy on the Federal Reserve's Board of Governors by the end of the week, and had separately narrowed the possible replacements for Fed chair Jerome Powell to a short list of four.

Federal Reserve governor Adriana Kugler's resignation creates high odds that the nation will soon learn who the next leader of the central bank will be. Why it matters: There is a high likelihood that President Trump's nominee to the vacant post will join the Fed well before the chairmanship of its current leader,

Trump has launched a series of scathing attacks on Powell over his refusal to reduce interest rates. The president claimed that the central banker is "TOO ANGRY, TOO STUPID, & TOO POLITICAL, to have the job of Fed Chair" in a post on his Truth Social website on Thursday.