NextGen America was founded in 2013 as NextGen Climate. The organization changed its name in 2017 to better reflect that it was not only concerned about environmental issues, but also would be a leader in opposing President Donald Trump. 
NextGen founder Tom Steyer is a left-wing billionaire activist who spent $123,000,000 during 2018 in campaigns promoting Democratic candidates and advocating for impeaching president Donald Trump.  NextGen America focuses on supporting government action to combat global warming and helping elect Democrats.
NextGen teamed up with SEIU International and Planned Parenthood Votes to turn out Democratic voters in the battleground state of New Hampshire during 2016.  On a conference call, Steyer said the goal was to defeat Donald Trump and Senator Kelly Ayotte (R-N.H.). The $2,000,000 get out the vote effort focused on liberal issues such as a $15 minimum wage, promoting labor unions, global warming, and pro-abortion policies. 
NextGen partnered with Hollywood liberal actors to produce ads pushing millennials to get out and vote for candidates promising to fight global warming as part of the #WhyWeVote campaign.  One ad featured actress Natalie Portman, a longtime Democrat that campaigned for John Kerry, Barack Obama, and Hillary Clinton during their presidential campaigns.  NextGen spent hundreds of thousands on promoting the ad. Another ad featured Aziz Ansari attacking Donald Trump because “he hates brown people” and for not believing in global warming.  Julia Louis-Dreyfus also worked with NextGen and made a video where she endorsed Hillary Clinton for president and Democratic U.S. Senate candidates Katie McGinty (D-PA), Catherine Cortez Masto (D-NV), Maggie Hassan (D-NH), and Deborah Ross (D-NC). 
During the 2018 election, NextGen founded Black Lives Rising which spent over $1,000,000 to turn out young Black Democrats.  Black Lives Rising partnered with left-of-center groups Color Of Change PAC, PushBlack, and the American Federation of State, County and Municipal Employees.  The program focused on turning out liberal voters in competitive races in North Carolina, Virginia, Pennsylvania, Florida, Michigan, and Wisconsin.
NextGen spent $5.2 million to elect Democrats during the 2018 election in Florida.  The organization was an early backer of Andrew Gillum during the Democratic gubernatorial primary, who was seen as a rising left-wing star in the party. NextGen organizers made over 75,000 phone calls and sent 300,000 texts on behalf of Gillum in the closely contested primary. 
NextGen attacked Reps. Mimi Walters (R-CA) and Dana Rohrabacher (R-CA) for supporting offshore drilling. NextGen took out a half page ad in the Orange County Register, bought billboards on a busy freeways in the area, and organized a protest against Walters and Rohrabacher. 
NextGen opposed John Morganelli (D-PA) in Pennsylvania 7th U.S. House District Democratic primary.  Morganelli was a pro-life Democrat and had taken some conservative stances on illegal immigration. These stances motivated NextGen to spend about $100,000 to defeat Morganelli. 
NextGen’s opposition to the Keystone XL pipeline dates back to shortly after the group’s founding when it spent $1,000,000 on TV ads opposing the pipeline.  In 2015, Steyer berated Senators for voting to build the pipeline even as nine Democrats voted in favor of it.   When the Obama administration rejected the pipeline later in 2015, NextGen released a digital ad celebrating the pipeline’s defeat and called for a focus on renewable energy. 
NextGen has advocated for divesting from coal.  Steyer also issued a statement supporting the Obama administration’s proposed changes to the federal coal leasing program which increased costs to businesses. 
In 2018, NextGen provided $1,000,000 to the Immigrant Legal Services Center to help illegal immigrants with legal representation in their bids to stay in the United States.  In 2017, NextGen spent $2,300,000 on supporting legal services for illegal immigrants, with its partners representing over 800 clients.  NextGen supports a path to citizenship for illegal immigrants.