What has caused the Democratic Party to lurch so far left?

[Reaganfan]

Seriously? Today's Democratic Party of hating Wall Street and cheering black people who chant "We want dead cops", and who may actually nominate a socialist...isn't that extreme? Even if I thought with a liberal hat on...why so extreme left?

You have Hillary running against policies her husband supported. This article from several weeks ago made me think about what could have caused this.

http://hotair.com/archives/2015/11/02/has-the-liberal-wing-of-the-democrats-finally-pushed-the-party-too-far/

[Reaganfan]

Check out your party's front runner, then come back and ask this question.

Don't spin it back talking about Republicans. I asked about the Democrats.

[Reaganfan]

I think there is more to it than that. I've read some articles that claim the "Reagan Era" might actually be more 1981 to 2009 than 1981 to 1989. Basically that Bill Clinton and the Democrats were a de-facto extension of Ronald Reagan and George Bush.

You'd never see a Democratic President sign NAFTA. You'd never see a Democratic President get an FOP Police endorsement. You'd never see a Democratic President say we have to "end welfare as we know it".

Am I wrong?