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Melania Trump has pledged to help women and protect children from cyberbullying should she become first lady, but her words contradict her husband Donald Trump‘s history of behaviour.

“Our culture has gotten too mean,” Mrs. Trump said Thursday at a rally in Pennsylvania, a key state in Tuesday’s U.S. presidential election, as she vowed to tackle cyberbullying.

Yet Mr. Trump, the Republican presidential candidate, has been known to go on Twitter rants and attacks, often using insulting and abusive language online and on the campaign trail.

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In her speech Mrs. Trump said her husband is committed to making America a place where there is respect for women and equal opportunity.

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“We must win on Nov. 8 and we must come together as Americans. We must treat each other with respect and kindness, even when we disagree. “This man I know so well, Donald Trump, with your help and God’s grace, will make America great again.” Tweet This

While Mrs. Trump promises to be a champion for her gender, her husband’s treatment of women has nearly imploded his campaign. A leaked video revealed Trump saying he can “do anything” to women, and at least 10 women have come forward claiming to have been sexually assaulted by Trump.

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The bad behaviour dates back decades; Former Miss Universe 1996 Alicia Machado said Trump’s treatment of her left her battling an eating disorder.

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“Trump called me ‘Miss Piggy’, ‘Miss Housekeeping’, ‘Miss Eating Machine’,” Machado said at a recent rally for Democratic nominee Hillary Clinton.

“Soon it became a joke. Alicia Machado was a fat Miss Universe. It was really painful for me.” Tweet This

Machado’s support of Clinton prompted Trump to go on a tirade in September, suggesting people “check out sex tape” of “disgusting” Machado, which by the way, seemingly doesn’t exist.

Did Crooked Hillary help disgusting (check out sex tape and past) Alicia M become a U.S. citizen so she could use her in the debate? — Donald J. Trump (@realDonaldTrump) September 30, 2016

His attacks often focus on appearance, and can be incredibly crude.

.@ariannahuff is unattractive both inside and out. I fully understand why her former husband left her for a man- he made a good decision. — Donald J. Trump (@realDonaldTrump) August 28, 2012

“Sarah Jessica Parker voted ‘unsexiest woman alive’ – I agree. She said ‘it’s beneath me to comment on the potential Obama charitable gift.’ What’s really beneath her?” Trump posted on Facebook in 2012.

“It must be a pretty picture, you dropping to your knees.” Trump said to a female contestant in 2013 on an episode of Celebrity Apprentice. Tweet This

READ MORE: Struggling with female voters, Trump has wife stump at Wisconsin rally

Even before he was officially the Republican nominee, Trump took aim at Clinton with a sexist and lewd comment.

“If Hillary Clinton can’t satisfy her husband what makes her think she can satisfy America #MakeAmericaGreatAgain.” Trump tweeted in April 2015, which he later deleted.

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He also criticised the appearance of Republican candidate Carly Fiorina in a 2015 interview.

“Look at that face! Would anyone vote for that?” Tweet This

WATCH: Donald Trump under attack for suggesting fellow GOP candidate not pretty enough to be president

After Mrs. Trump’s speech on Thursday, many online commenters were quick to point out that she should start her work to combat cyberbullying and poor treatment of women at home, with her husband.

If Melania Trump wants to stop cyber bullying, she should delete her husband's Twitter account — TheNewDeal (@TheNewDeal) November 3, 2016

Dear Melania Trump: Try starting your anti cyber-bullying campaign with disabling your husbands Twitter account :) — lauren (@lolo_llen) November 3, 2016

huh Melania Trump says if she's 1st lady she will fight against cyberbullying. Isn't she married to the biggest cyberbully on twitter? — American Idol Fan (@krummy09) November 4, 2016

If Melania Trump really wants to fight cyberbullying, she should just change Donald's wifi password. — Michael Blackman (@ParaComedian09) November 3, 2016

Melania Trump is a joke wanting to stop cyberbullying girl bye 👋 u got a bully sitting at home who goes on rants on twitter quit it. — Jayy (@WhosdatJayy_) November 4, 2016

With files from the Associated Press and Kevin Nielsen

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