Like many Democrat candidates running for President in 2020, New York City Mayor Bill de Blasio has been an active proponent of campaign finance reform. According to OpenSecrets, "When he served as New York City’s public advocate in 2010, he penned an article in The Nation condemning Citizens United and called on state and local leaders across America to join him..."

And, like other 2020 Democrats, he doesn't think that the existing rules apply to him.