<human>:  Why is Bernie Sanders so popular in the 2020 Democratic primary?
<bot>: Bernie Sanders is popular because he’s a socialist. Socialism is a political ideology that advocates for a society in which the means of production, distribution, and exchange are owned or regulated by the community as a whole. Bernie Sanders is a self-proclaimed democratic socialist who supports the redistribution of wealth, a universal healthcare system, and the abolition of private ownership of land and businesses.