Late Show host Stephen Colbert shocked TV audiences with a comic sketch about Donald Trump's reaction to the Orlando nightclub massacre which ended with him drawing a swastika on a chalkboard.

Colbert was reacting to a speech Trump made on Monday in which he blasted President Obama's reaction to the incident at The Pulse gay club in Florida in which Omar Mateen gunned down 49 people before being killed in a shootout with police.

Trump had said: 'We’re led by a man that either is not tough, not smart, or he’s got something else in mind... There is something going on.'

Later Trump said in a radio interview: 'I’ll let people figure out for themselves.'

Colbert said he considered himself one of those 'people' and he strode up to the chalkboard andsaid he was drawing out a 'Figure-It-Out-Atron' to work out what Trump was getting at.

He wrote the words Muslim, Bad Thing, Not Smart, Radical Islam, Something Going On, Inconceivable, Obama, Trump in a clockwise configuration on the chalkboard.

Then after a short monologue he connected several of the words to create a swastika shape.

The sketch drew a big response from Trump opponents on Twitter.

Stephen Colbert shocked audiences when he drew this swastika to mock Donald Trump's reaction to the weekend's nightclub massacre in Orlando, Florida

The skit was in response to an interview, in which Trump said something was suspicious with President Obama's failure to call the Orlando gunman a radical Muslim. Colbert said he would figure out what was going on on the show, and to get in Trump's