The Post-ABC poll finds 86 percent of Americans support implementing “red flag” provisions, which allow guns to be taken from people judged to be a danger to themselves or others. And 89 percent support expanding federal background checks to cover private sales and gun-show transactions. Both measures are supported by at least 8 in 10 Republicans, white evangelical Christians, members of gun-owning households and other traditionally conservative groups.

More far-reaching restrictions also have majority support, the survey finds, albeit by more modest margins. Six in 10 support a federal ban on gun magazines holding more than 10 rounds of ammunition.

A 56 percent majority supports a new federal ban on sales of military-style assault weapons, and nearly all who support such a ban also back a mandatory federal buyback program for those weapons — a notion that has been decried as government “confiscation” by gun-rights supporters and has been at the fringes of the national gun debate until recently.