Mr Harawira was yesterday indefinitely suspended from the party's caucus after ongoing tensions reached breaking point at Waitangi over the weekend.
Last month, party whip Te Ururoa Flavell laid a formal complaint after Mr Harawira wrote in a newspaper column that the party was too wrapped up in its coalition with National and was supporting anti-Maori policies.
A disciplinary committee was due to meet tomorrow to discuss the complaint.
Fronting at Parliament today, Mr Harawira would not give an inch.
"I can't regret anything that I said in that article because when I raised the issues about we, as a party, needing to be clear about who our constituency is, determining our policies according to their needs and aspirations, and being strong in the positions that we take... those are exactly the things that I'm hearing from Maori Party members all throughout the Tai Tokerau."
Mr Harawira made it clear he wanted to stay in the party, and said he wanted to see the dispute handled privately, in a Maori way, rather than through legal processes in the glare of the media.
"I am sincerely hoping that good sense comes to play, common sense comes to play and that the Maori Party membership's wish that this whole issue be put aside and dealt with properly behind closed doors on a marae somewhere, according to kaupapa Maori."
He would not speculate about whether he would act as an independent MP if he was expelled from the party at tomorrow's hearing.
"This isn't about me threatening the party with 'I'm going to do this if I don't get that', it's not about that at all... I am not even contemplating what another party might look like, sound like, be peopled by, or a by-election or anything else."
Speaking to media this afternoon, party co-leader Pita Sharples said Mr Harawira would have to show that he could accept the leadership and join a consensus on bills if he wanted to regain the trust of his colleagues.
"It would need to be an admission by him that he would be prepared to come within the code of behaviour, and the activities and the requirements of being in caucus," Dr Sharples said.
"It's entirely up to him and that message is very clear.
"We're all really quite close as people, so maybe he can see that there is a way forward for him to go, change his ways and be part of the team."
Dr Sharples said Mr Harawira was wrong to claim that he was the only one in the party speaking up against anti-Maori proposals.
"All the things he speaks about, is what we challenge in Cabinet," Dr Sharples said.
"We're only five people against the National Government, but we've made changes so we've got somewhere."
Fellow co-leader Tariana Turia also rejected Mr Harawira's claims.
"It's difficult when you have someone out there saying 'I'm the only one who does this, the leadership are doing that, I am the only pure voice of the people', none of that is true," Ms Turia told Radio Live.
"After the weekend we had a conference call and a meeting and we decided that if we didn't act now we would get to today and have more of the same. We're sick of it."
Ms Turia said the party had tried to resolve issues with Mr Harawira using a Maori process for five years but it had not worked.
She said the door would remain open for Mr Harawira, but he would need to earn back the party's trust.
