Opening arguments began at the trial of a former sheriff's deputy accused of failing to protect pupils during the 2018 mass shooting at Parkland's Marjory Stoneman Douglas High School.

The US trade deficit widened by the most in eight years in April as imports of goods rebounded while exports of energy products declined.

Taylor Budowich, a former spokesman for Donald Trump, said on Wednesday he had appeared before a grand jury in Miami to answer questions about the former president's handling of classified documents after he left the White House.

The city council approved funding for a new training centre that protesters have fought for years due to concerns about heavy-handed policing and the environment.