[Contagion]

It's simple. They are fleeing from the shitty environments that they helped to create in the first place by their votes at the ballot box.

You can apply this to any political agenda, in any state.

For example, lets take the issue of taxation in California.

California was once a red republican state. Liberals moved en-masse to California. They then voted in leftists politicians who raised the taxes.

Before long, the left gained power and went further and further to the left on economic taxation policies. This resulted in California having, to this day, a shitty tax environment that nobody who makes decent money wants to be a part of.

As a result, the liberals who moved en masse to California got tired of the high taxation policies that the politicians they voted into office enacted.

So, what did they do? They fled their new shitty tax environment to red conservative states that have lower taxes.

And what did they do when they firmly established residence and became eligible to vote in their new state?

They now vote in leftist politicians who raise the taxes.

As the left gains power and goes further and further to the left on economic policies, the same liberals who voted in the politicians who enacted high taxation policies, will eventually get tired of said taxation policies.

And what will they do?

They will flee their new shitty tax environment to red conservative states that have lower taxes.

And the cycle will repeat itself.

A shithole is a shithole for a reason.