Washington (CNN) Despite reality television's junk-food TV reputation, the genre has lasted and evolved for more than two decades. And what's more, it's grown into a political force in America.

And the show has the distinction -- along with "The Apprentice," of course -- of being one of the few reality shows that hasproduced a real-lifepolitician: Rep. Sean Duffy, a Wisconsin Republican, who appeared on the 1997 Boston season.

Reality televisiontook off in the 2000s with hit shows like "Survivor" and "American Idol," and in 2007, they filled the space left by a dearth of new scripted shows due to the writers strike . They featured democratic plot devices, like voting off the island or voting for your favorite contestant. Some shows featured casts more diverse than the typical TV show or movie, offering viewers a glimpse at the experience of people of different races, genders, and sexual orientations. American networks took concepts from foreign reality shows and reimagined them for American audiences, while US-made shows were spun off into international versions that exported American values.

While many of the early reality TV shows were set in big, stereotypically liberal cities, networks eventually began airing shows set in red states, like "Duck Dynasty" and "17 Kids and Counting," featuring the ever-growing Duggar family in the late '00s and early '10s. Former vice presidential candidate Sarah Palin got her own reality show, "Sarah Palin's Alaska," as did Republican Caitlyn Jenner, with "I Am Cait" after she came out as transgender.

(Sidenote: During the 2016 campaign, a Hollywood producer approached John Kasich's campaign about possibly producing a reality show, Kasich's chief strategist John Weaver told CNN's COVER/LINE . The idea was to show a presidential campaign on the ground, but "once we got into the details of it, it didn't work out the way we wanted," Weaver said.)

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These shows created a new, less famous but parallel class of stars for conservatives , who've long lagged behind liberals in a celebrity arms race. During the 2012 campaign, Barack Obama was supported by some of America's biggest stars . Meanwhile, Republicans received celebrity endorsements from people like the Duggars, who backed Rick Santorum, and Kelly Clarkson, who once tweeted praise for Ron Paul. And the eventual nominee Mitt Romney was endorsed by reality star and future president Donald Trump.

The great irony of reality TV is that it isn't necessarily real. While some shows hew more closely to being a documentary than others, the constructed plot lines and heightened drama are staples of the genre. For many viewers, the manufactured aspects of reality TV are accepted as part of the spectacle, not unlike in professional wrestling.

But there's evidence that for some viewers, it can warp their sense of reality. A 2013 study published in Psychology of Popular Media Culture of 145 young adults, for example, found that heavy viewers were more likely to believe that women in the real world behaved like stereotypically dramatic reality stars.

Danielle Lindemann, an assistant sociology professor at Lehigh University who teaches about reality TV, believes these shows fuel skepticism in our culture about what is real.

"We kind of all know that it's sort of curated and ... it's scripted in some ways," she said in an interview with COVER/LINE. "We have this skepticism about the images being portrayed to us, the reality of those images, and that extends now to media and politics. It's all sort of connected."

It's something Donald Trump has used to his advantage, she said, as a candidate and president.

"To say, 'Well I have these data points, but that's not real, that's fake news,'" she said. "To call into question everything -- it's something we're used to doing from our viewing of reality TV."

Trump often runs his presidency like a reality show. He frames his rivalries with name calling, attempting to box fellow Republicans, Hillary Clinton, and the media into simple, made-for-TV archetypes. He builds story arcs in which he is the hero, whether taking credit for ending his own administration's family separation policy at the border, or claiming to ease tensions with North Korea that he helped ramp up.

But no moment better encapsulated reality television's political power than the other Kim summit, between two celebrities who got their reality TV starts on NBC properties in the '00s.

When Kim Kardashian West, the star of "Keeping Up With The Kardashians" and the most famous and polarizing reality star not named Donald, got an Oval Office meeting with the star of "The Apprentice," it was more than a photo-op, it influenced policy, with Trump commuting the lifetime sentence of a nonviolent drug offender.

Reality TV has grown up since "The Real World": there are reality shows about dating, baking, hoarding -- you name it -- dominating the lineups on MTV, TLC, the History Channel, and other networks.

But despite its growth and pervasiveness -- and despite launching the political career of the 45th president of the United States -- reality TV still isn't taken entirely seriously.

It should be. Reality TV has taken over American politics, and shaped our culture and our very perception of truth.