First lady Melania Trump told ABC News in an exclusive interview that she has told her husband there have been people in his administration she didn't trust who worked for him. 
 
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 She also said she believes she is one of the most bullied people in the world. 
 
 Asked by ABC News Chief National Affairs Correspondent Tom Llamas whether there are still people in the president’s administration "he can't trust," the first lady said yes. 
 
 "It's harder to govern," the first lady said in a clip set to air Thursday on "Good Morning America." "You always need to watch your back." 
 
 The first lady's comments come on the heels of a recent op-ed in The New York Times by an anonymous senior Trump administration official who claimed that many senior officials are trying to "frustrate parts of [Trump's] agenda." 
 
 ABC News 
 
 Trump blasted the essay on Twitter as "gutless" before sending out a one-word tweet: "TREASON?" 
 
 ABC News' wide-ranging interview with the first lady took place in Africa, where she traveled to promote her "Be Best" campaign, which raises awareness about online bullying. 
 
 The first lady explained how her experience being bullied led in part to her "Be Best" initiative. 
 
 "I could say that I'm the most bullied person in the world," Melania Trump said. 
 
 Pressed by Llamas on that assertion, she responded, "One of them -- if you really see what people are saying about me." 
 
 Tune in this Friday, Oct. 12, at 10 p.m. for more of the ABC News special, "Being Melania -- The First Lady." ||||| Melania Trump pledges to combat cyber-bullying as first lady 
 
 CLOSE If she becomes a first lady. Time 
 
 If Melania Trump is first lady, she'll focus efforts on putting an end to bullying on social media. 
 
 In her first solo speech since the Republican National Convention, Melania Trump on Thursday called for an end to online bullying of children and teenagers, saying, it is "absolutely unacceptable when it’s done with no name hiding on the internet." 
 
 “Technology has changed our universe. But like anything that is powerful it can have a bad side. We have seen this already. As adults, many of us are able to handle mean words — even lies. Children and teenagers can be fragile. They hurt when they are made fun of or made to feel less in looks or intelligence. This makes their life hard and forces them to hide and retreat. Our culture has gotten too mean and too rough especially to children and to teenagers.” 
 
 "We have to find a better way to talk to each other, to disagree with each other, to respect each other," she continued. She did not make any reference to the fact that her husband has engaged throughout the campaign in bare-knuckled personal attacks on his political opponents, the media, random celebrities and a host of others. 
 
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 Her speech in Berwyn, Pa. — a suburb of Philadelphia — was directed at suburban women, a group that could be critical if Trump wants to pull-off a win next week. 
 
 "People have asked me, if Donald is the President, what kind of First Lady will you be?" Melania Trump said. "It will be my honor and privilege to serve this country. I will be an advocate for women and for children." 
 
 Trump’s wife has stayed mostly out of the spotlight since her speech at this year’s Republican National Convention, which included a section taken directly from Michelle Obama’s 2008 convention speech. She was joined on the trail Thursday by Indiana Gov. Mike Pence's wife Karen — who gave a glowing introduction. 
 
 Melania Trump focused on her upbringing in Slovenia and making it to America. 
 
 "I'm an immigrant and let me tell you no one values the freedom and value of opportunity more than me," Melania Trump said. She said it took her 10 years to become a U.S. citizen. "Love for this country is something we immediately shared when I met Donald." 
 
 "He certainly knows how to shake things up — doesn’t he?" she asked, eliciting cheers from the crowd. 
 
 Washington Post-ABC News tracking polls released this week have Donald Trump losing white, college-educated women by roughly two dozen points. Mitt Romney won the group by 6 points according to exit polls. 
 
 One way the campaign has tried to appeal to suburban voters in Pennsylvania is to dispatch some of his less bombastic surrogates to the area. His daughter Ivanka Trump held a series of “coffee with Ivanka” events in the Philadelphia suburbs last month. 
 
 Melania Trump delivers remarks at a campaign rally in Berwyn, Pa. Nov. 3, 2016. (Photo: Mandel Ngan, AFP/Getty Images) 
 
 Pennsylvania is one of a handful of states critical to Donald Trump's election. Currently, Clinton leads by an average of 3 points, but polls over the last week have shown a tightening in the race. 
 
 “Pennsylvania is a state that we are confident winning. It’s a state (whose) makeup fully relates to Mr. Trump’s message as well as Mrs. Trump’s message,” Boris Epsteyn, a senior adviser to the campaign, told USA TODAY on Thursday. 
 
 The campaign has spent a significant amount of time in Chester County, a Philadelphia suburb, where the city of Berwyn is located. 
 
 It’s a county in battleground Pennsylvania full of white, college-educated voters, a demographic with which Donald Trump has struggled. 
 
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– Melania Trump has doubts about some of the people who rub elbows with her husband in the West Wing. She thinks there are people there he can't trust, the first lady tells ABC News' Tom Llamas in a clip from an interview filmed during her trip to Africa. Trump says she gives her husband her "honest opinions" on individuals, with the result that "some people, they don't work there anymore," per CNN. But "you always need to watch your back," she says. Trump also paints herself as the perfect person to be leading a campaign against online bullying: "I could say that I'm the most bullied person [in] the world … one of them, if you really see what people are saying about me," she says. Referring to the effect bullying has on kids, she adds, "we need to educate the children [about] social-emotional behavior ... That's very important." Trump spoke about the #MeToo movement in an earlier clip. The full interview, touching on infidelity and child migrants, airs Friday.