"Donald Trump is the only American in public office who has refused to acknowledge explicitly their attack in 2016": Sen. Richard Blumenthal called the upcoming Helsinki summit with Russian president Vladimir Putin "deeply alarming" on @FaceTheNation https://t.co/YJDdcaGRC5 pic.twitter.com/FwANUWsZ2I— CBS News (@CBSNews) July 1, 2018