The vortices weaken and strengthen from year to year. When the vortex of the arctic is strong, it is well defined, there is a single vortex, and the arctic air is well contained; when weaker, which it generally is, it will break into two or more vortices; when very weak, the flow of arctic air becomes more disorganized and masses of cold arctic air can push equatorward, bringing with it a rapid and sharp temperature drop.

The general assumption is that reduced snow cover and sea ice reflect less sunlight and therefore evaporation and transpiration increases, which in turn alters the pressure and temperature gradient of the polar vortex, causing it to weaken or collapse. This becomes apparent when the jet stream amplitude increases (meanders) over the northern hemisphere, causing Rossby waves to propagate farther to the south or north, which in turn transports warmer air to the north pole and polar air into lower latitudes.

Donald J. Trump
(@realDonaldTrump)
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!

https://en.wikipedia.org/wiki/Kamala_Harris#Early_life_and_education

Kamala Harris was born on October 20, 1964, in Oakland, California, to a Tamil Indian mother and a Jamaican father.

BuzzFeed says its sources are "standing behind" the bombshell report about the special counsel investigation.
"We're being told to stand our ground. Our reporting is going to be borne out to be accurate, and we're 100% behind it," investigative reporter Anthony Cormier told CNN's Brian Stelter on "Reliable Sources" Sunday.

"They (Democrats) should do the right thing for the Country & allow people to go back to work," Trump tweeted.

"If today, the national emergency is border security ... tomorrow the national emergency might be climate change."

In total, (the National Debt will) be $22 trillion any day now...