VIRAL VIDEO: 'Hamilton' Lin-Manuel Miranda's freestyle rap with US President Barack Obama - Watch

Washington DC: This video showing Hamilton star and writer Lin-Manuel Miranda freestyling with US President Barack Obama is going viral!

In the viral video, tweeted by the White House, President Barack Obama can be seen holding up flash cards as Lin-Manuel Miranda rapped freestyle for him.

His rap included words like constitution, Obamacare, NASA, immigrants, POTUS and carbon footprint, among others.

Watch the viral video here:-