Early voting has opened in US midterm elections, with competitive Senate and House races, heavy spending, and disputes over mail-in voting shaping the campaign.

Warren Buffett is stepping down as chairman of Berkshire Hathaway, with his son Howard Buffett set to become non-executive chairman. The move is part of a broader succession in which Greg Abel is positioned to become chief executive.

Canada and the European Union are exploring a tighter relationship, including the possibility of associate membership for Canada, as trade pressure from the United States under President Donald Trump intensifies. Trump has called the prospect a possible 'hostile act.'

An officer with U.S. Immigration and Customs Enforcement has pleaded not guilty to federal charges after a nonfatal shooting in north Minneapolis. The charges center on an allegation that the officer lied to the FBI. Minnesota authorities carried out the arrest.

Jon Kyl, who represented Arizona in the United States Senate and later returned briefly to fill the seat left vacant by John McCain's death, has died at 84.