USA TODAY

In the wake of the Oct. 1 massacre in Las Vegas, Congress suddenly has interest in banning an obscure rifle attachment called a "bump stock" that makes a semi-automatic weapon act like an automatic weapon.

But broad agreement that this piece of hardware is a bad idea does not necessarily mean Congress can move quickly to ban it — just wait for the battles over exactly what counts as a "bump stock" — and it gets lawmakers no closer to an agreement on broader gun control issues like background checks.

USA TODAY reporter Nicole Gaudiano joined our Cup of Politics podcast to discuss what has and has not changed in the gun debate since Las Vegas,