They didn't attach it to the bill to kill the case. They attached it to the bill because they knew the demorats would never take the measure up for a vote.
Barry made a motion to repeal it, from the DC side.
(Wonder how much the Brady campaign paid him to do that?)
The pressure on DC not to let this get in front of the USSC must be huge.
The gun grabbers seem to be in damage control mode - two little laws, in DC, got struck down, where everybody is armed, anyway.
Much better than that the USSC rules 2A protects individuals, in their thinking.