As Republican presidential nominee Donald Trump and some of his top surrogates push a narrative that the U.S. election is “rigged” against him, observers warn that the controversial rhetoric is dangerous and divisive—and possibly self-serving.

Politico wrote Sunday that the real estate mogul “is laying the groundwork to lose on Nov. 8, refuse to concede the election, and teeter the country into an unprecedented crisis of faith in government. Republicans and Democrats, in Washington and beyond, fear that the aftermath of the 2016 election will create a festering infection in the already deep and lasting wound that the campaign is leaving on America.”

Amid slipping poll numbers last week, Trump called the presidential election “one big fix” and “one big, ugly lie.” He doubled down on his efforts to delegitimize the election outcome in tweets on Sunday and Monday:

As the New York Times reported Sunday:

But former New York City mayor and Trump supporter Rudy Giuliani was apparently spreading a different message, telling CNN‘s Jake Tapper on Sunday: “I’m sorry, dead people generally vote for Democrats rather than Republicans. You want me to [say] that I think the election in Philadelphia and Chicago is going to be fair? I would have to be a moron to say that.”

Though pundits, election officials (many of them Republican), and democracy experts alike have downplayed and denounced such claims, they seem to be landing with voters.

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