Labor is sharpening its attack against federal government backbencher Gladys Liu over undeclared donations and previous links to the Chinese Communist Party.
The opposition twice failed in attempts to suspend business in the lower house on Monday, calling on Ms Liu to make a statement to parliament.
Labor leader Anthony Albanese said the prime minister had effectively prevented Ms Liu from providing a "statement to parliament in her own words" by tabling a written statement prepared by the prime minister's office that was issued outside the chamber.
"The prime minister has been exposed for his hubris, he has been exposed for his opportunism, and he has been exposed for his hypocrisy," Mr Albanese told parliament.
"Legitimate questions have been raised about the member for Chisholm (Ms Liu)."
During question time, Mr Morrison labelled the opposition leader's attack weak and lame and said Labor should look to its own ranks.
"The reason we have foreign interference laws in Australia is because of the former Senator (Sam) Dastyari and the Labor Party should well know that," he said.
"Their record on this issue is an absolute shambles ... and nor can they hide from what the Labor leader of NSW said, before the last state election, that Asians would take their jobs."
Labor's leader in the Senate, Penny Wong, said it was telling that for all the bluff and bluster, neither Mr Morrison nor his upper house representative Mathias Cormann would stand up in parliament and assert Ms Liu was a fit and proper person to be elected.
"The prime minister could end this pretty quickly," she told ABC News.
Instead, he had sought to bring the whole Chinese-Australia community into the debate, and that deliberate tactic concerned her.
"The accusation seems to be if you ask a person who's of Chinese heritage a difficult question, that that's somehow a racial attack," she said.
"You have asked me a couple of difficult questions, you'll probably ask me a few more. Do you think you're racist? Do you think that's a racial attack? I mean, it's absurd and wrong."
Mr Morrison has repeatedly claimed there is a "grubby undertone" to the allegations aired against his rookie MP, but has carefully stopped short of using the word "racist".
Former coalition government minister Christopher Pyne has no such hesitation.
In an opinion piece published in the Adelaide Advertiser on Monday, he said Ms Liu was being persecuted in an attempt to hound her out of parliament.
"If Ms Liu was a white, blonde haired, blue eyed, Anglo Celtic woman, rather than an Australian of ethnic Chinese background, would she be facing the treatment that she has had to tolerate in the last week? I doubt it," Mr Pyne wrote.
"There is an ugly strain of xenophobic paranoia running through this story."
Australian Associated Press