In an interview with "The Nation" on March 6, 2014, Sanders said that he was "prepared to run for President of the United States" in 2016 but did not officially announce a campaign.
On April 28, 2015, Vermont Public Radio said that Sanders would run for president starting on April 30. They reported that he would run for the Democratic presidential nomination against the front-runner Hillary Clinton, who was leading in the poll numbers. His campaign manager is Jeff Weaver. Weaver was also Sanders's senate campaign manager and was his chief of staff. The official announcement came on May 26 in Burlington, Vermont. His campaign was supported by Democratic Socialists of America.
Sanders' campaign events have brought many people from around the country. Sanders said he was "Stunned. Stunned. I mean I had to fight my way to get into the room. Standing room only. Minneapolis was literally beyond belief."
Months after his campaign started, poll numbers showed Clinton was the most likely to win the Democratic nomination. However, on June 25, 2015, "The New York Times" said that Sanders might win the primaries instead of Clinton. On August 12, 2015, the "Boston Herald" said that Sanders was winning by 44% to Clinton's 37% in New Hampshire among Democratic primary voters. A poll released on August 25, 2015, showed that Sanders was once again winning in New Hampshire with 42% to Clinton's 35%.
During his campaign, Sanders was known for his popularity among millennials and young voters. In the 2016 campaign, Sanders won more votes among those under age 30 than both Trump and Clinton combined. It shows more than 2 million young people cast ballots for Sanders before the primaries in June. His popularity led to the creation a Facebook political meme page Bernie Sanders' Dank Meme Stash which has gained popularity among his supporters and the internet.
A poll released in September 2015 showed that Sanders was leading Clinton in Iowa with 41% to Clinton's 40%. In October 2015, polling showed Sanders and Clinton were tied in polls in both New Hampshire and Iowa. In November 2015, a poll showed Sanders was increasing his numbers in New Hampshire, almost tied with Clinton.
On November 19, 2015, Sanders gave a speech at Georgetown University about his views on democratic socialism. In his speech, Sanders talked about how the policies of presidents Franklin D. Roosevelt and Lyndon B. Johnson were based on democratic socialism.
On December 3, 2015, a Quinnipiac University poll found Sanders to be the Democratic candidate more likely to win the presidential election against top Republican candidates such as Donald Trump, Jeb Bush, Marco Rubio, Ted Cruz and Ben Carson. On December 4, 2015, after online voting ended, votes showed that Sanders was in first place to become "Time's" 2015 Person of the Year. He had 10.4% of votes compared to second place holder Malala Yousafzai's 5.3%. On December 7, "Time" announced that Sanders won the reader's poll of the magazine, but he would not be person of the year. On December 9, poll numbers showed that Sanders was leading Clinton in the New Hampshire polls by 50% to 40%. The university also showed Clinton was winning with 61% to Sanders's 30% of the national poll.
In January 2016, in weeks leading to the Democratic primaries, Sanders was leading New Hampshire by 50% to Clinton's 46% and in Iowa with 49% to 43%. On January 21, 2016, Sanders' campaign advertisement, America, was shown in Iowa and New Hampshire. Many people liked the ad and the "New York Times" said it was "powerful" and "inspiring".
In early February 2016, a national poll showed Sanders and Clinton almost tied with Clinton's 44% to Sanders' 42% in the national poll. A few weeks later, Quinnipiac University, CNN and Fox News poll numbers showed Sanders being the front-runner with 47% to Clinton's 44% of the national poll. After the Nevada caucus, new poll numbers showed Sanders's national lead growing with 42% to Clinton's 36%. A February 2016 Quinnipiac University poll found that Sanders was the most honest candidate in the election.
On March 8, 2016, Sanders won the Michigan Democratic primary. Political experts and news networks called it an upset victory. Polls showed Clinton winning by many numbers. On March 11, 2016, a mass protest over a planned Trump rally at the University of Illinois at Chicago caused hundreds to clash and four people were injured. In the aftermath, Trump accused of Sanders and his supporters of creating the protest to purposely cancel the Trump rally. Sanders later called out Trump as a "pathological liar" who leads a "vicious movement", and said that "while I appreciate that we had supporters at Trump's rally in Chicago, our campaign did not organize the protests".
In early April 2016, national poll numbers showed Sanders winning by 49% to Clinton's 47%. On April 8, Sanders was asked by Vatican City to talk about the issues of income inequality and the environment. Sanders agreed to the invitation and spoke at the Vatican on April 15. While on his trip, he met with Pope Francis in private. In April 2016, Sanders was added into "Time's 100 Most Influential People" of 2016. His introduction was written by former United States Secretary of Labor and supporter Robert Reich.
In May 2016, national poll numbers showed Sanders loosing to Clinton with 45% to Clinton's 50% with 5% people undecided. On May 3, 2016, Sanders pulled another political upset after beating Clinton in the Indiana primaries by six percent. Earlier poll numbers showed Clinton winning in Indiana. On May 10, 2016, Sanders won the West Virginia primaries by 51.4% to Clinton's 35.8%. In 2008, Clinton had won that election by 66.93% to her primary challenger Barack Obama's 25.17%.
A NBC/Wall Street Journal poll in May found Clinton and presumptive Republican nominee Donald Trump in a tie, but the same poll found that if Sanders were the Democratic nominee, 53% of voters would support him to 39% for Trump. Clinton and Trump were the least popular likely candidates in the poll's history, while Sanders received a 43% positive with a 36% negative rating.
On June 6, 2016, Clinton reached the number of delegates to become the presumptive Democratic Party nominee. Sanders said he will still remain in the race until the Democratic Party convention in Philadelphia, Pennsylvania in July 2016. On July 12, 2016, Sanders announced his support for Clinton at a unity rally in New Hampshire.
On July 22, 2016, WikiLeaks revealed that DNC Chairwoman Debbie Wasserman Schultz and other DNC official, mocked and planned to sabotage the Sanders's campaign in favor of Clinton. Sanders said he wanted Schultz to resign. The next day, Schultz announced that she will resign after the Democraitc convention on July 28, 2016.
Sanders spoke on the first night of the Democratic Convention on July 25, 2016. In his speech, Sanders told his supporters that he thanked them and to vote for Clinton to defeat Donald Trump in the general election. On July 26, 2016, during a roll-call vote at the 2016 Democratic National Convention Sanders lost the nomination to Clinton.
On February 1, 2016, Sanders lost the Iowa caucus to Clinton by less than 1%. On February 9, Sanders won the New Hampshire caucus by 22%. His victory was one of the largest in years. Sanders became the first democratic socialist and the first non-Christian to win a United States presidential primary for a major party. On February 20, 2016, Sanders lost the Nevada caucus by 5%. On February 27, 2016, Sanders lost the South Carolina primary by almost 48%.