He told reporters "there was pressure put on, in respect to Joe Biden. What Joe Biden did for his son, that's something they should be looking at." Mr Trump's remarks came after US media reported that days before his phone call with Mr Zelensky, Mr Trump instructed his acting chief of staff, Mick Mulvaney, to withhold nearly $400m in military aid for Ukraine. But the US president insisted on Tuesday that nothing untoward happened during the "perfect call". Mr Trump and his conserv