next few minutes but for now, let's just remind ourselves of how we got here with the bbc‘s gary donohueessence, "you scratch my back, i'll scratch yours." thank you very much, mr president. that's what the president stands accused of. pressuring ukraine's volodymyr zelensky to investigate mr trump's opponents in return for hundreds of millions of dollars in aid. and that allegation has persuaded the top house democrat to drop her resistance. i'm announcing the house of representatives moving forward with an official impeachment inquiry. everything centres on a july phone call with president zelensky, in which mr trump brought up joe biden and his son, hunter, who'd worked for a ukrainian gas company. in the partial transcript of the call, donald trump asks for a favour. he then asks about a conspiracy theory surrounding the 2016 election, but goes on to say... i had a perfect phone call... perfect, it was a perfect conversation. it was absolutely perfect! a week before the call, a military aide had been put on hold by the white house. the president insists the two things were not linked