The politician has faced widespread backlash after blaming Muslim immigration for Friday's Christchurch shooting and then striking a teenager who smashed an egg on his head during a media conference.

"We all would have seen the horrendous video on the weekend of the Senator being egged," Mr McCormack said.

"No one - no politician should be in any way interfered with when they're doing a press conference or while they're going about their daily political lives."

However, he said the Senator's reaction was shocking.

"The Senator turned around and his original reaction was to strike out at that individual. When he saw that the young fellow was in fact just a kid and to go and hit him again was just beyond the pale.

"So as Prime Minister Scott Morrison said, he should face the full force of the law. The whole incident needs to be looked at."

Mr McCormack said the Senator should not have been egged, but he said the way people at the media conference dealt with the prankster was "almost brutish".

He said the Senator also needed to apologise for the comments he made about Muslim immigration.

Mr McCormack added that Mr Anning got into parliament due to a "quirk" in the system.

"He only got 19 votes, I mean even his family didn't vote for him," Mr Anning said.

He took a further swipe at him, saying he was likely to get even fewer votes if he was to stand again in the next election.

More than one million people have signed an online petition to have Mr Anning removed from parliament after his remarks about the Christchurch tragedy.

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