WATCH: Blumenthal struggles to back his claim Barrett’s nomination is “illegitimate”

Moments after President Trump formally nominated Judge Amy Coney Barrett for the Supreme Court, Senator Richard Blumenthal (D-CT) tweeted “I will refuse to treat this process as legitimate & will not meet with Judge Amy Coney Barrett.”

Asked by Wolf Blitzer what is “illegitimate” about what Republicans are doing, Blumenthal appeared to struggle to answer. Rather than point to anything illegal, Blumenthal argued “under the norms and tradition and unwritten rules of the Senate it is illegitimate.”

Pressed further by Blitzer, Blumenthal admitted “it may not violate the letter of the constitution.”

This is what Blumenthal tweeted after Amy Coney Barrett’s nomination.