Robert O'Brien: Trump's national security adviser tests positive for coronavirus

Robert O’Brien, President Donald Trump’s national security adviser, tested positive for Covid-19 after attending a family event and has been self-isolating at his home while working remotely, according to reports.

The 54-year-old Republican is the fourth national security adviser to serve in the White House under Mr Trump, and has held the position since 2019. His diagnosis was first reported by Bloomberg News’ White House reporter Jennifer Jacobs.

This is a breaking story and will be updated.