Google co-founders Larry Page and Sergey Brin step back from their day-to-day roles at Alphabet, US senator Kamala Harris drops out of the 2020 presidential race and the 70th-anniversary summit of Nato begins on a fractious note.  Plus, US House Democrats have accused Donald Trump of abusing his office for political gain. The FT’s Peter Spiegel unpacks the report that will pave the way for articles of impeachment and a trial in the Senate.  See acast.com/privacy for privacy and opt-out information.