It comes after a video showed a group at a white nationalist conference performing Nazi salutes and shouting 'Hail Trump'
US President-elect has moved to disavow the alt-right amid continued controversy over the loose-knit fringe group.
The Southern Poverty Law Center - which aims to "combat hate, intolerance and discrimination" - describes the alt-right as "a set of far-right ideologies, groups and individuals whose core belief is that 'white identity' is under attack by multicultural forces using 'political correctness' and 'social justice' to undermine white people and 'their' civilisation".
The alt-right - which has received more mainstream attention after being heavily criticised by Hillary Clinton during a campaign speech - has been increasingly accused of promoting white nationalism.
Yesterday, The Atlantic released a video of Richard Spencer - the man who popularised the term 'alt-right' and head of the white supremacist National Policy Institute - and a crowd at a conference shouting 'Hail Trump' as some in attendance performed Nazi salutes.
The video led to activists calling for Mr Trump to condemn the actions.
"It’s not a group I want to energise, and if they are energised, I want to look into it and find out why.”
He also specifically disavowed and condemned the actions of those at the recent conference.
Trump also moved to defend Stephen Bannon - the former Breitbart News head who has been appointed as Trump's chief strategist in the White House.
Breitbart has been accused of fostering and promoting the alt-right, but Trump today told supporters that it is "just a publication":
On Bannon:"If I thought he was a racist or alt-right or any of the things, the terms we could use, I wouldn't even think about hiring him."— Maggie Haberman (@maggieNYT) November 22, 2016
Trump is asked about concerns from minority groups about Breitbart News’s coverage under Steve Bannon. His reply: pic.twitter.com/FBqCGwQpBr— Mike Grynbaum (@grynbaum) November 22, 2016