♪ ♪ award winning interface. ♪ ♪ award winning design. ♪ ♪ award winning engine. ♪ ♪ the volvo xc90. our most awarded luxury suv. ♪ ♪ we're learning more tonight about president trump's phone call that was so concerning to a whistle-blower, a source telling cnn he put pressure on the president of ukraine this summer to investigate joe biden's son. let's bring in pamela brown with more on this. pamela, you've been following this story very closely. thanks for joining us. good evening to you. cnn has confirmed that president trump pressured ukraine's