(TNS) Despite outrage over a cycle of deadly mass shootings in California and other states, a new poll out Monday has found plummeting support for a national assault weapon ban, reflecting what even backers say may be growing pessimism over whether such a law would reduce violence.

President Joe Biden and Gov. Gavin Newsom have called for a ban, and California Sen. Dianne Feinstein introduced a new ban bill last month, similar to one Congress allowed to expire after 10 years in 2004. California has banned the sale of assault weapons since 1989, but it is under legal challenge.