"Biden will propose legislation codifying what should be a simple tenet of campaign finance law: any group that advocates for or against candidates for federal office in its ads or communications must disclose its contributors. No more hiding behind 'dark money' groups to spread lies. This law will require all online ads, how they’re targeted, and who paid for them to be posted by the groups to a public database on a new one-stop website, ethics.gov — so no one can target voters with misinformation without attracting media or political attention."