WASHINGTON (AP) — Seizing on a medical milestone that doesn't exist, President Donald Trump said Tuesday he thinks the same scientific expertise that produced a vaccine for AIDS can deliver one soon for COVID-19, too. There is no vaccine for AIDS.

Trump also accused the previous administration of making no effort to stop abusive policing, ignoring a conspicuous drive by President Barack Obama to do just that.

Trump addressed policing and the pandemic in remarks at the White House for the signing of an executive order encouraging better law enforcement practices. A day earlier, his vice preside...