The House of Representatives approved the rules and guidelines for the impeachment inquiry into Trump on Thursday. I see there is already an up-to-date Wikipedia entry about the impeachment inquiry.
Here is the start of it:
An impeachment inquiry against Donald Trump, President of the United States, was initiated on September 24, 2019, by U.S. House Speaker Nancy Pelosi.It began after a whistleblower alleged that President Trump and other top government officials had pressured the leaders of foreign nations, most notably Ukraine, to investigate former U.S. vice president and 2020 Democratic presidential candidate Joe Biden and his son Hunter—abusing the power of the presidency to advance Trump’s personal and political interests. These allegations have been corroborated by testimony so far, by U.S. top-envoy-to-Ukraine Bill Taylor, Laura Cooper (the top Pentagon official overseeing Ukraine-related U.S. policy), White House administration official Fiona Hill, at least six additional White House officials, and many other witnesses.