President Donald Trump's search for the next chair of the U.S. Federal Reserve has come down to Fed Governor Jerome Powell and Stanford University economist John Taylor, Politico on Thursday cited one source as saying, while another counseled caution. Powell or Taylor will reportedly replace Janet Yellen whose four-year term ends in February 2018.

Trump has said he was considering both Powell and Taylor, but that he also liked Yellen very much. Politico cited an unnamed source who talks regularly to Trump as saying the only finalists were Powell and Taylor.

Another unnamed senior source Politico described as very close to the process said it was not safe to assume Trump will nominate Powell or Taylor for the top spot at the central bank, saying he "changes his mind about it every day."