Three leading conservative gun-rights senators on Thursday slapped President Obama for using the Newtown Elementary School slayings to push gun control, and warned that they will demand 60 votes in the Senate for anti-gun legislation to proceed.

In a release following the president’s latest gun comments, Utah Sen. Mike Lee said that he, Texas Sen. Ted Cruz and Kentucky Sen. Rand Paul have informed Senate Majority Leader Harry Reid that they will require a 60-vote threshold to advance new gun legislation.