President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Monday asked "what the hell is going on" with global warming as states in the Midwest prepare to face wind chills as low as 65 degrees below zero this week.

Trump in a tweet also urged global warming to "come back fast."

"In the beautiful Midwest, windchill temperatures are reaching minus 60 degrees, the coldest ever recorded. In coming days, expected to get even colder. People can’t last outside even for minutes. What the hell is going on with Global Waming? Please come back fast, we need you!"

In the beautiful Midwest, windchill temperatures are reaching minus 60 degrees, the coldest ever recorded. In coming days, expected to get even colder. People can’t last outside even for minutes. What the hell is going on with Global Waming? Please come back fast, we need you! — Donald J. Trump (@realDonaldTrump) January 28, 2019

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Northeast and Midwest states will face below-freezing temperatures as a polar vortex descends on that portion of the country this week.

Trump has repeatedly denied the existence of climate change and has sometimes pointed to individual weather events as evidence that climate change isn't real. Others have pointed out that weather refers to day-to-day atmosphere and can vary significantly, while climate is the average weather over a long period of time.

During a massive snowstorm in the Midwest and Northeast earlier this month, Trump mocked global warming by writing in a tweet that it "wouldn’t be bad to have a little of that good old fashioned Global Warming right now."

"Be careful and try staying in your house. Large parts of the Country are suffering from tremendous amounts of snow and near record setting cold. Amazing how big this system is. Wouldn’t be bad to have a little of that good old fashioned Global Warming right now!" he tweeted at the time.