Legal criteria for homegrown terror are murky, and critics say changing laws could have symbolic value, give law enforcement more resources to combat threat

Dozens people gunned down in pair of deadly attacks include mom who died protecting her newborn baby, parents fundraising for son's little league and would-be nurse

Medical officials say one of the new fatalities was an elderly woman, though identities not released

US president urges condemnation of 'racism, bigotry and white supremacy' after 2 fatal shootings, says social media monitoring must be improved

Gunman had posted racist 'manifesto' to message board; Cloudflare head says site's 'lawlessness has caused multiple tragic deaths'

After three lethal mass shootings in less than a week, some take more precautions while others remain defiant

Also among dead was a man who helped those with cancer; a mother of two, including a newborn, who was studying nursing; three children left orphaned

At his New Jersey golf course, US president posts messages of support for El Paso and Dayton awkwardly mixed in with those promoting a celebrity fight and attacking political foes

Both Republicans and Democrats call for federal government to take threat more seriously, with some accusing US President Donald Trump of dangerously fanning racial tensions

Top candidates in Democratic primaries says US president's language against minorities promotes racial division and violence