NEW: CNBC: Two law firms linked to Rudy Giuliani, President Donald Trump's lawyer and longtime confidant, worked for a super PAC that employed controversial data-gathering firm Cambridge Analytica during the 2016 presidential election. https://t.co/1iZUFcjgH8 via @schwartzbCNBC— Evan Rosenfeld (@Evan_Rosenfeld) May 30, 2018