Trump won because of election interference from Russia.

Key Evidence and Methods of Russian election interference:

• Cyber Hacking: Russian military intelligence (the GRU) hacked the computer networks of the Democratic National Committee (DNC), the Democratic Congressional Campaign Committee (DCCC), and key campaign officials like John Podesta, subsequently releasing stolen data via outlets like WikiLeaks, DCLeaks, and Guccifer 2.0. [1, 2]
• Social Media Disinformation: The St. Petersburg-based Internet Research Agency (IRA) used hundreds of fake social media personas, bot networks, and purchased advertisements to amplify divisive political and social issues, masquerading as U.S. citizens to sway public discourse. [1, 2]
• Targeting Election Infrastructure: Russian cyber actors scanned and probed state voter registration databases and election systems across multiple states ahead of the 2016 election, though vote tallies were not altered. [1, 2]
• Criminal Indictments: Federal grand juries indicted dozens of Russian nationals and military intelligence officers for computer hacking, identity theft, and conspiracy against the United States. [1, 2]

Official Findings

• Intelligence Community Assessments: Concluded that the Russian leadership developed a clear preference for Donald Trump and aimed to denigrate Hillary Clinton while undermining public faith in the American democratic process. [1, 2]
• Bipartisan Senate Findings: Confirmed the extensive nature of these foreign cyber and influence operations, noting coordination between online Russian fronts and active distribution channels