Take, for example, the ban on semi-automatic firearms modeled after military assault weapons proposed by Feinstein, a California Democrat, and backed by Obama.
Fiercely opposed by the National Rifle Association, Republicans and some Democrats, Reid calculated that it would be best not to include it in the main bill because it would invite a filibuster.
In the House, Speaker John Boehner, R-Ohio, has said the chamber would look at anything the Senate approved. But he's not promising a vote.
"What the NRA does as well if not better than any organization in this country I do what you do in the old civics courses. You educate your supporters," Feldman said. "You get them to communicate their views with elected officials in a targeted manner."