Impeachment inquiry… U.S. House of Representatives Speaker Nancy Pelosi launches an official probe into President Trump over alleged abuse of power during a phone call with Ukrainian President Volodomyr Zelenskiy, saying “no one is above the rule of law.” The news sends the S&P 500 lower, with the index logging its worst day in a month, and garners a furious reaction from Trump who calls the move “witch hunt garbage”. He also promises to release a transcript of the conversation in which he is accused of seeking dirt on political rival, former U.S. vice-president Joe Biden. In the U.K., opposition leaders call on Boris Johnson to resign after the Supreme Court rules his suspension of parliament is unlawful, prompting the British Prime Minister to cut short his visit to New York. And in corporate news, office rental firm WeWork CEO Adam Neumann resigns in the face of shareholder pressure following his failed attempt to take the company public.