Meet Richard Grenell, Trump's Pick For Acting Intelligence Chief

President Trump appointed Richard Grenell as acting director of National Intelligence, replacing Joseph Maguire. Grenell will continue his role as US envoy to Berlin. Previously, he served as a spokesman for the US ambassador to the UN and worked on Mitt Romney's 2012 campaign. Critics highlight his lack of intelligence experience, and he is not expected to be nominated for the permanent position, which requires Senate approval.

What is the expected duration of Grenell's role as acting director?

What is required for someone to be nominated as the permanent director of National Intelligence?