Bernie Sanders is a United States Senator from Vermont, a former member of the US House of Representatives from Vermont, and former Mayor of Burlington.He has taken positions on many political issues, both through his public comments and based on his senatorial voting record.In 2015, he announced his candidacy for the Democratic nomination for U.S. President in the 2016 presidential election.e has taken positions on many political issues, both through his public comments and based on his senatorial voting record. In 2015, he announced his candidacy for the Democratic nomination for U.S. President in the 2016 presidential election.