Analysis: John Cornyn flips on filibuster as he seeks Trump’s support

Texas GOP Sen. John Cornyn, who has long defended the filibuster and warned against attempts to weaken it, published an op-ed in the New York Post Wednesday morning in which he said he’ll support changes to Senate rules in order to pass a voter ID and proof of citizenship bill. CNN’s Dana Bash reports on the significance of Cornyn’s decision as he seeks President Donald Trump’s support.