As authorities continue to investigate the mass shooting that killed 10 people in Boulder, Colo., lawmakers from there to Washington, including President Biden, are pressing for legislative action banning assault weapons. The gun linked to the shooting suspect would have been included in a city assault-weapons ban that was blocked by a judge just days before.

Boulder Mayor Sam Weaver (D) said the city would appeal that ruling to the state Supreme Court, and he echoed Biden’s calls for a federal ban. And Sen. Michael F. Bennet (D-Colo.) gave an impassioned speech on the Senate floor, saying “we can’t wait any longer” to pass stricter gun-control legislation and scolding his colleagues for leaving a generation to “bear the burden of a national government that did nothing to protect them.”

Here are some significant developments: