Tom Morello is a world-renowned musician who has performed in groups such as Rage Against the Machine, Audioslave and Prophets of Rage.
Apart from being a very highly respected guitarist, the 53-year-old is a motivated political activist who has incorporated a lot of his views into his songs.
Adopting a more left-wing point of view, Morello and the bands have criticised capitalism, cultural imperialism, corporate America and the government in their lyrics.
It might not come as a shock to you but he is not a fan of Donald Trump and he isn't afraid to tell anyone.
Last week he shared this image on his Instagram account which let the President know exactly what he thought of him.
Most people who like Morello's music tend to share his political views but one Instagram user to an exception to this strong stance against Trump.
A man going by the name of davez67 dared to comment on the photo saying:
Another successful musician instantly becomes a political expert.
Although he isn't a politician, Morello has knows a fair bit about politics as he actually studied political science at Harvard University, graduating with a BA in social studies in 1986.
Not wanting to let this guy get away with anything, Morello replied with a devastating comeback and shared it on Instagram.