Maverick MP Bob Katter implied he was unaware of the mass shooting in Orlando before publishing a controversial and ill-timed campaign advertisement in which he shoots dead two political rivals.

In a chaotic and heated exchange with Sunrise's David Koch, Mr Katter defended the "screamingly funny" video and said he "quite frankly would have no idea" about the worst gun massacre in modern US history.

"I don't know what is going on in the media. I don't watch television. I get to bed at midnight every night," the leader of the Katter's Australian Party said.