(CNN) In another sign of the dangerous predicament facing President Donald Trump, his longtime ally Republican Sen. Lindsey Graham said in an interview that aired Sunday night that he could not rule out the possibility of impeachment if new evidence emerges. Swan was referencing Trump's request in a White House phone call to Ukraine's President for help investigating former Vice President Joe Biden and his son Hunter . His comments undercut denials by the President of a quid pro quo, and stunned White House staffers who questioned his strategy. "I don't think there's any question but that going on TV, on the White House lawn and saying, 'China, will you investigate my political opponent?' "Well, I'm not gonna run against President Trump.

Source: CNN October 21, 2019 01:18 UTC