Rep. Alexandria Ocasio-Cortez challenged Trump on his favorite social media platform, Twitter after he claimed that he did not see the increase in white nationalism as a threat.

“White supremacists committed the largest # of extremist killings in 2017. What the President is saying here: ‘if you engage in violent acts of white supremacy, I will look the other way,'” Ocasio-Cortez stated.

“Understand that this is deliberate. This is why we can’t afford to sit on the sidelines.”

She also shared a post from the Southern Poverty Law Center, which stated that it has seen a 50 percent rise in white nationalist groups between 2017 and 2018.

"White supremacy is flourishing amid fears of immigration and the nation’s shifting demographics.

"In this issue of the Intelligence Report, we trace the rage against change that helped propel hate to a new high last year: in fact, the highest number of hate groups we’ve ever counted.

"Regardless of President Trump’s political fortunes, the form of race-based populism that he has fueled and exploited is likely to be with us for many years," the site reads.

Trump was asked by a reporter last Friday at the Oval Office whether he thought the rise of white nationalism around the world constituted a threat.

“I don’t really. I think it’s a small group of people that have very, very serious problems. It’s certainly a terrible thing,” Trump replied.

The question came after the massacre of 50 Muslim worshipers at two mosques in New Zealand by a white supremacist who also cited Conservative Candace Owens as an inspiration in a 74-page manifesto.