A woman who has accused President Donald Trump's Supreme Court nominee, Brett Kavanaugh, of sexual assault decades ago wants her allegations to be investigated by the FBI before she appears at a US Senate hearing, her lawyers say.

A woman who had anonymously accused President Donald Trump's US Supreme Court nominee, Brett Kavanaugh, of sexual misconduct in the early 1980s goes public.

President Donald Trump nominates Brett Kavanaugh for the US Supreme Court as he aims to entrench its conservative control for years to come, but the federal appeals court judge faces a tough confirmation fight in the bitterly divided Senate.