Jan 30 (Reuters) - President Donald Trump said on Thursday he intends to announce his pick to replace Federal Reserve Chair Jerome Powell on Friday, with speculation intensifying that the nod will go to former Fed governor Kevin Warsh. Bloomberg News ​later reported that the White House is preparing for Trump to nominate Warsh as the next Fed chair, citing people familiar ‌with the matter. Warsh, on the short list of candidates to lead the central bank when Powell's leadership term ends in May, went to ...