AP
According to VPR's sources, Sanders will launch his campaign on Thursday with "a short statement on that day and then hold a major campaign kickoff in Vermont in several weeks."
A CBS News producer wrote on Twitter that his outlet confirmed VPR's report. Sanders' office did not immediately return a request for comment from Business Insider.
If Sanders enters the race, he would start out as a steep underdog against the Democratic front-runner, former Secretary of State Hillary Clinton. However, the self-described socialist would be likely seek to make an impact by challenging Clinton from the left.
Last updated 4:40 p.m.