"If there is a nuclear tactic being used here, I submit it is the use of that obstruction where a willful minority blocks a bipartisan majority from voting on the President's judicial nominees"

John Cornyn is suggesting that the minority party is using a nuclear tactic by blocking the President's judicial nominees. He believes that the bulk celebration is being blocked from voting on the President's judicial candidates by a willful minority. This blockage is preventing the majority party from having their voices heard and their votes counted. This is a kind of nuclear tactic because it is preventing the majority party from having their say in the matter. It is a kind of power play by the minority party to prevent the bulk party from having their say in the matter. This is a harmful technique since it can lead to a breakdown in the democratic process and prevent the majority party from having their say in the matter.