Data: College Reaction; Note: ±3.4 margin of error; Chart: Axios VisualsIn the last two months, Bernie Sanders has surged 20 points among college students to become the group's clear 2020 favorite, according to a new College Reaction/Axios poll.Why it matters: The numbers reflect the extent to which young Democratic voters are embracing socialism and rejecting moderate choices.By the numbers: While his pitch to voters has remained constant, Sanders has continuously gained traction among college students, rising from 15.5% in September to 22.5% in December and now 42.3%.It has been Sanders, not moderate candidates, appearing to win peel-off support as competitors like Andrew Yang, Kamala Harris, Beto O'Rourke and Cory Booker have dropped out of the race. An NPR/PBS NewsHour/Marist poll this week laid bare just how weak support is for moderate candidates among young Democratic voters. Among Democrats and Democratic-leaning independents 45 and under:Sanders - 54%Warren - 16%Bloomberg - 8%Biden - 6%Buttigieg, Klobuchar - 5%Flashback: Recent polling shows that 70% of millennials would vote for a socialist, compared to 36% of baby boomers and 33% of the Silent Generation.Methodology: The poll was conducted Feb. 17 from a representative sample of 820 college students with a margin of error of +/- 3.4%.College Reaction’s polling is conducted using a demographically representative panel of college students from around the country. The surveys are administered digitally and use college e-mail addresses as an authentication tool to ensure current enrollment in a four-year institution. The target for the general population sample was students currently enrolled in accredited 4-year institutions in the United States.