NEW: In the wake of two mass shootings in two weeks, Senate renews efforts to overhaul U.S. gun laws

This will be a slog.

Even the most modest and popular ideas, like universal background checks, face a murky path.

The more ambitious proposals are DOA.https://t.co/0AhnvsrSLi

— Sahil Kapur (@sahilkapur) March 23, 2021