The shooting in Lakeland, Florida, has drawn renewed attention to the state's "stand your ground" law.
Britons voted to leave the European Union by a narrow margin in a 2016 referendum. Prime Minister Theresa May has ruled out another public vote on the subject.
No one won the latest Mega Millions drawing on Friday night, meaning the jackpot climbs to a staggering $1.6 billion on Tuesday.
Warren's "types of claims can damage the validity and work of indigenous people who are living their identities every day," one Native American educator said.
Parliamentary elections took place Saturday across the country, but were postponed in the province of Kandahar after a deadly attack on Thursday killed the region's police chief.