India, Sept. 15 -- Charlie Kirk, the right-wing activist who was assassinated last week, "could have been President, certainly a governor", according to US President Donald Trump's top adviser Peter Navarro.

Kirk, a far-right Republican, was also "the greatest political organiser in the last 50 years" and should be remembered as a historical figure, Navarro told CNBC in an interview on Monday.

Navarro listed the Turning Point USA youth group founder and podcaster as an organiser he rates as hight as the "top two", David Axlerod and Ralph Reed.

David Axlerod was the Democratic chief strategist to Barack Obama during his 2008 and 2012 presidential campaigns; and Ralph Reed is a key figure behind religio-political Christian Coalition of t...