A video has emerged showing Richard Spencer, a leader of the so-called "alt right movement", leading a white nationalist crowd in salutes of "Hail Trump!"

Many of the more than 200 attendees at the conference appeared to give the Nazi arm salute as they echoed Mr Spencer's declaration.

Here's what we know about him so far...

Who is Richard Spencer?

As president of a think tank called the National Policy Institute, Richard Spencer has been credited with coining the term "alternative-right", or "alt-right" for short.

His non-profit group, which promotes the white nationalist movement, is "dedicated to the heritage, identity, and future of people of European descent in the United States".

Mr Spencer, who has called for “peaceful ethnic cleansing”, says he dreams of a "new society, an ethno-state that would be a gathering point for all Europeans".