The sitting Liberal member for the seat of Perth has hit out at her party's preference deal with Pauline Hanson's One Nation (PHON), paying for Facebook advertising to highlight her lack of support for the party and its policies.

In a very public stand against the deal, Eleni Evangel said she did not support intolerance or discrimination.

"A significant proportion of this electorate are born overseas, or are the children of migrants, myself included," she said.

"In this democratic nation, people must be free to live according to their own beliefs regardless of where they were born, and to celebrate their ethnicity, sexuality, and religion.

"As long as I am the local MP for Perth, I will fight for us to be a welcoming community that allows freedoms for individuals and families as long as they don't hurt others."

The daughter of Greek migrants has strong connections in many ethnic communities.

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"I do not support One Nation or their policies," she said.

Some electors 'not supportive' of deal

Ms Evangel won the seat from Labor in the 2013 election.

"I'm a wog - and very proudly so - and am also proud to be an Australian," she said.

But with a slim 2.8 per cent margin, Ms Evangel is under pressure to hold on to the seat.

Her main challenger is Vincent Mayor John Carey, who is running for Labor. There are no PHON candidates in the race for Perth.

Ms Evangel said some members of her electorate were not supportive of the deal.

"I just wanted to make it clear to my electorate and to everybody that just because this preference deal has been negotiated, it's not a reflection of my values and what I stand for because I certainly don't have anything in common with the values and policies of One Nation," she said.